ERP migration
Field-level mapping, validation, and rollback between Tyler Enterprise ERP and Epicor Prophet 21. We move data and schema; workflows are rebuilt natively in Epicor Prophet 21.
Tyler Enterprise ERP
Source
Epicor Prophet 21
Destination
Compatibility
13 of 14
objects map 1:1 between Tyler Enterprise ERP and Epicor Prophet 21.
Complexity
BStandard
Timeline
6-10 weeks
Overview
Moving from Tyler Enterprise ERP to Epicor ERP is a domain migration, not a system upgrade. Tyler Enterprise ERP is built for U.S. local governments and school districts with a data model structured around GASB-compliant fund accounting, appropriation controls, and position-level budget tracking. Epicor ERP is a commercial manufacturing and distribution platform that has no native fund-accounting structure, no GASB compliance layer, and no position-level budget concept. We resolve this schema gap during scoping by remapping Tyler's fund code hierarchies into Epicor's commercial chart of accounts, storing fund-level reporting balances as custom fields and sub-account dimensions. We extract historical journal entries with full audit trail timestamps, vendor and 1099 records with W-9 status intact, and position-level budget authorizations from Tyler's Position Control module, translating them into Epicor compensation budget allocations against departments. Custom plugin data, approval workflows, and Tyler-specific reports do not migrate; we deliver a written inventory of these for the customer's admin team to rebuild in Epicor's native tools.
Every standard and custom field arrives verified.
AI proposes the map; you confirm before any record moves.
Parent–child, lookups, and ownership stay linked.
Calls, emails, meetings — with original timestamps.
Documents, uploads, and inline notes move with the record.
Why teams make this switch
Leaving
What's pushing teams away
Choosing
What's pulling them in
Object mapping
Each row shows how a Tyler Enterprise ERP object lands in Epicor Prophet 21, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
Tyler Enterprise ERP
Fund Codes
Epicor Prophet 21
Chart of Accounts (Account + Custom Segments)
lossyTyler structures all accounting around government fund codes following GASB standards. Epicor has no native fund-accounting structure, so we extract fund type definitions, fund codes, and cost center hierarchies and remap them into Epicor's commercial chart of accounts. We preserve fund-level reporting balances as custom fields on the Account record (e.g., fund_code__c, fund_type__c) or as sub-account segments in Epicor's multi-segment account structure. The mapping must be validated against the organization's GASB audit requirements before cutover.
Tyler Enterprise ERP
General Ledger
Epicor Prophet 21
GL Transaction Entry
1:1GL transactions, journal entries, and account balances export from Tyler's standard reports with full audit trail timestamps and user attribution. We extract historical journal detail by fund and fiscal period, mapping each Tyler fund-account line to an Epicor Account segment. Epicor's GLJrnTran records preserve the transaction date, fiscal period, and source module. We maintain the original posting user as a custom field since Epicor's native user tracking ties to Epicor user accounts, not the Tyler's original users.
Tyler Enterprise ERP
Accounts Payable
Epicor Prophet 21
AP Invoice and Payment Entry
1:1Vendor invoices, payment runs, and 1099 vendor records export from Tyler's AP module. We extract open payables and full payment history with vendor linkage intact, mapping Tyler vendor records to Epicor Vendor records and Tyler invoice lines to Epicor APTran entries. 1099 classification, W-9 status, and payment terms migrate to Epicor Vendor fields. Open AP balances are verified against Epicor's AP open balance report post-migration.
Tyler Enterprise ERP
Accounts Receivable
Epicor Prophet 21
AR Invoice and Receipt Entry
1:1AR transactions, customer billing records, and receipt history export from Tyler's AR module. We preserve customer-to-invoice relationships and payment applied detail, mapping Tyler AR customers to Epicor Customer records and Tyler invoice headers to Epicor InvcHead with line items on InvcDtl. Receipt history and applied cash migrate as Epicor CashRcpt records linked to the original invoices.
Tyler Enterprise ERP
Budgets
Epicor Prophet 21
Budget Header + Budget Line
1:1Tyler budget entries are structured around appropriation periods and funding sources specific to government budgeting cycles. We extract budget versions and amendment history, mapping Tyler's fund-budget-department relationships to Epicor's budget structure. Since Epicor has no native appropriation-control model, fund-budget linkages store as custom fields on Epicor Budget records, and the customer's Epicor admin configures budget-check workflow rules in Epicor BAM or BPM if appropriation controls are required to persist.
Tyler Enterprise ERP
Purchasing
Epicor Prophet 21
Purchase Order and Requisition
1:1Purchase orders, requisitions, and approval workflows export from Tyler's purchasing module. We extract PO history with vendor and line-item detail, mapping Tyler vendor references to Epicor Vendor, Tyler item codes to Epicor Part or MfgPart records, and PO line quantities to Epicor POLine. Approval routing does not migrate; we document the Tyler approval workflow structure for the customer's Epicor admin to rebuild in Epicor BPM.
Tyler Enterprise ERP
Position Control
Epicor Prophet 21
Job and Compensation Budget Allocation
1:1Position Control tracks staffing at the position level rather than employee level, which is a critical distinction for school districts managing hiring against approved position budgets. We extract position definitions, budget authorization amounts, and incumbent status. In Epicor, position-level budget authorizations map to department-level compensation budget allocations in Epicor's HR module, and positions without incumbent employees are flagged for manual position-to-employee reconciliation in Epicor. This is a high-severity mapping gap that requires explicit scoping sign-off.
Tyler Enterprise ERP
Human Resources
Epicor Prophet 21
Employee and Job Record
1:1HR data in Tyler Enterprise ERP for Schools includes employee records, job classifications, and org structure. We extract employee demographics, job titles, department assignments, and compensation. Government-specific job titles and custom fields require field-level mapping against Epicor's HR schema. Epicor Employee records are employee-centric (not position-centric), so position-to-employee mapping requires resolution against the Position Control translation in scope item 7.
Tyler Enterprise ERP
Vendors
Epicor Prophet 21
Vendor
1:1Vendor master records with 1099 classification, W-9 status, and payment terms export from Tyler's vendor file. We preserve all active and historical vendor relationships, mapping them to Epicor Vendor records with address book linkage, payment terms, and 1099 configuration intact. Epicor's Vendor table supports multiple addresses and contacts via the VendorPP and VendorAttr tables, which we populate from Tyler's vendor contact records.
Tyler Enterprise ERP
Custom Fields
Epicor Prophet 21
Custom Properties / UD Fields
1:1Tyler permits user-defined custom fields across modules. We inventory all custom field definitions during scoping and map them to Epicor user-defined (UD) fields on the corresponding Epicor table (e.g., PartLot_c, Vendor_c). Epicor UD fields follow a specific naming convention and require pre-creation in Epicor's customization tools before data load. Type translation is required since Tyler field types do not map one-to-one to Epicor field types.
Tyler Enterprise ERP
Documents and Attachments
Epicor Prophet 21
Document Management (attached to Epicor records)
1:1Tyler's document management captures scanned invoices, contracts, and supporting files. We extract document references and binary attachments where accessible via Tyler's file storage. Epicor's native document management attaches files to records via DocStar or Epicor's internal document storage. We map Tyler's document references to Epicor's document links on the equivalent records (AP Invoice, AR Invoice, Purchase Order), though some Tyler legacy formats may require conversion or may be flagged as non-migratable.
Tyler Enterprise ERP
Audit Trails
Epicor Prophet 21
Audit Log (custom archive)
1:1Tyler maintains comprehensive transaction audit logs across modules. We extract audit trail records to preserve compliance documentation required by government oversight bodies. Epicor's native audit logging does not cover historical Tyler records, so we deliver the audit trail data as a structured archive (searchable CSV or JSON) attached to the Epicor company as a read-only reference dataset, not as live Epicor records. This satisfies the government's requirement for historical audit access without forcing Tyler audit log entries into Epicor's transactional schema.
Tyler Enterprise ERP
Vendor 1099 History
Epicor Prophet 21
AP Payment History linked to Vendor
1:1Tyler's 1099 tracking is part of the AP module with vendor-level 1099 box assignments and annual 1099 reporting data. We extract the 1099 history by vendor and box type and map it to Epicor's APTran records tagged with 1099 box codes. Epicor's TaxConn module handles 1099 reporting, and we ensure vendor 1099 box assignments migrate as Epicor VendorTaxRi records. Historical 1099 form data for closed fiscal years is archived separately as PDF output from Tyler's 1099 report.
Tyler Enterprise ERP
Inventory (if present in Tyler deployments)
Epicor Prophet 21
Part and PartBin
1:1Tyler Enterprise ERP does not include a dedicated manufacturing inventory module, but some government deployments use Tyler's inventory or asset tracking for consumables and capital assets. If Tyler inventory records exist, we map them to Epicor Part (for stock items) and PartBin (for bin-level inventory) records. Epicor's Part table supports lot/serial tracking, multi-warehouse, and UOM conversions that Tyler's government-specific inventory may not. We flag any inventory records with non-standard UOMs for manual review before Epicor import.
| Tyler Enterprise ERP | Epicor Prophet 21 | Compatibility | |
|---|---|---|---|
| Fund Codes | Chart of Accounts (Account + Custom Segments)lossy | Fully supported | |
| General Ledger | GL Transaction Entry1:1 | Fully supported | |
| Accounts Payable | AP Invoice and Payment Entry1:1 | Fully supported | |
| Accounts Receivable | AR Invoice and Receipt Entry1:1 | Fully supported | |
| Budgets | Budget Header + Budget Line1:1 | Mapping required | |
| Purchasing | Purchase Order and Requisition1:1 | Fully supported | |
| Position Control | Job and Compensation Budget Allocation1:1 | Mapping required | |
| Human Resources | Employee and Job Record1:1 | Mapping required | |
| Vendors | Vendor1:1 | Fully supported | |
| Custom Fields | Custom Properties / UD Fields1:1 | Mapping required | |
| Documents and Attachments | Document Management (attached to Epicor records)1:1 | Mapping required | |
| Audit Trails | Audit Log (custom archive)1:1 | Fully supported | |
| Vendor 1099 History | AP Payment History linked to Vendor1:1 | Fully supported | |
| Inventory (if present in Tyler deployments) | Part and PartBin1:1 | Fully supported |
Gotchas + challenges
Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.
Tyler Enterprise ERP gotchas
Fund accounting schema mismatch blocks commercial ERP migrations
Position Control vs. Employee-centric HR creates downstream budget misalignment
Custom plugin dependencies are invisible in standard Tyler exports
Expedited migration paths favor Tyler cloud, not cross-platform exits
Pricing is opaque—custom-quote only with no public tiers
Epicor Prophet 21 gotchas
Third-party bolt-on integrations complicate migration scope
Dirty data without standardized processes compounds migration risk
SDK customizations and BPMs may not survive platform upgrades
Report-based export only for non-technical users
Per-user pricing model requires accurate user count before migration planning
Pair-specific challenges
Migration approach
Discovery and fund-accounting impact assessment
We audit the source Tyler Enterprise ERP environment across modules deployed (GL, AP, AR, Budgeting, Purchasing, Position Control, HR), fund code structure depth (number of fund types, fund codes, and cost centers), historical transaction volume by fiscal year, active Tyler custom fields, and documented third-party plugin integrations. We pair this with a fund-accounting impact assessment: does the destination Epicor org already exist (greenfield) or is Epicor already live with data that needs to coexist with the Tyler migration? The discovery output is a written migration scope, a fund-remapping strategy document, and an Epicor configuration requirements list for the customer's Epicor admin.
Chart-of-accounts remapping design and Epicor configuration
We design the Epicor chart of accounts based on the fund-remapping strategy. This includes provisioning Epicor Account segments (natural account, cost center, department) that can store the fund code and fund type as sub-account or custom fields, creating Epicor Budget structures mapped from Tyler's appropriation periods, and pre-creating all UD fields on Epicor tables for Tyler's custom field definitions. The Epicor schema is configured in a Sandbox org for validation before production migration. Tyler's fund-to-Epicor-account mapping is the most critical design artifact in this migration and requires sign-off from the organization's finance team and auditor before we proceed to extraction.
Sandbox migration and fund-balance reconciliation
We run a full migration into Epicor Sandbox using a representative data volume snapshot from Tyler. The organization's finance team reconciles fund-level balance totals from Tyler's trial balance against Epicor's GL account balances, validates that custom fields on Epicor accounts capture the correct fund code and fund type, and spot-checks 25-50 random journal entries for account and amount accuracy. Position Control records are validated against Epicor's department budget allocations. Any mapping corrections happen in the Sandbox before production migration begins. This step cannot be skipped because the fund-accounting validation requires human finance-team sign-off that cannot be replicated in production under migration-time pressure.
Position Control translation and HR data mapping
We extract Tyler's Position Control records by department, including position title, FTE count, budgeted compensation, and incumbent status. We resolve each Tyler's position to an Epicor department and design the budget-to-position translation (department-level compensation budget allocation or Epicor HR position records with authorization flags). Employee records from Tyler's HR module are mapped to Epicor Employee records with department linkage, job title, and compensation. Any positions without incumbent employees are held in a reconciliation queue for the customer's HR admin to map to Epicor's position structure. Epicor User provisioning for each migrated employee runs in parallel with data mapping.
Production migration in dependency order with DMT sequencing
We run production migration in Epicor's data load dependency order using Epicor's Data Management Tool (DMT) with batch sequencing. Vendor records load first (since they are referenced by AP, PO, and receiving), followed by GL account setup, AP vendors, AR customers, and budget records. GL transactions load next with fund-code resolution against the pre-configured Epicor chart of accounts. Position Control and HR data load after GL is validated. Documents and attachments load last. Each phase emits a DMT import log and row-count reconciliation report before the next phase begins. We use Epicor's DMT with PowerShell scripting for bulk operations, matching the approach documented in the Epicor User Help Forum for Kinetic DMT automation.
Cutover, audit trail delivery, and approval workflow handoff
We freeze Tyler write access during cutover, run a final delta migration of any records modified during the migration window, then enable Epicor as the system of record. We deliver Tyler's audit trail records as a structured, searchable archive linked to the Epicor company for compliance access. We deliver the approval workflow and appropriation control inventory document to the customer's Epicor admin team for BPM rebuild. We support a one-week hypercare window where we resolve reconciliation issues. We do not rebuild Tyler approval workflows as Epicor BPM inside the migration scope; that is a separate Epicor implementation engagement.
Platform deep dives
Tyler Enterprise ERP
Source
Strengths
Weaknesses
Epicor Prophet 21
Destination
Strengths
Weaknesses
Complexity grading
Standard ERP migration. 2 of 8 objects need a mapping; the rest are 1:1.
Overall complexity
Standard migration
Derived from compatibility, mapping clarity, API constraints, and data volume across Tyler Enterprise ERP and Epicor Prophet 21.
Object compatibility
2 of 8 objects need a mapping; the rest are 1:1.
Field mapping clarity
Field mapping is derived from defaults — final spec confirmed during the sample migration.
Timeline complexity
8-object category — typical timelines run 2–7 days end-to-end.
API constraints
Tyler Enterprise ERP: Not publicly documented for Tyler Enterprise ERP API.
Data volume sensitivity
Tyler Enterprise ERP doesn't expose a bulk API — REST + parallelization used for high-volume runs.
Estimator
Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.
Step 1
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