# Baan IV to Infor LN migration checklist

> Source: https://netray.co/erp-help/ln-baan-iv-migration-upgrade-checklist
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: ERP Help

## Short answer

Moving from Baan IV to Infor LN is a re-implementation, not an in-place upgrade, because the two products differ in data model, session technology and, for LN Enterprise Edition, the underlying runtime. The checklist centers on inventorying customizations, converting master data, rebuilding logic rather than porting it, and running a real parallel test before cutover.

## Kind

how-to

## System

infor-ln

## Erp

Infor LN

## Module

Migration / Upgrade Planning

## Query

baan iv to infor ln upgrade checklist

## Alternate Queries

- migrating from baan iv to infor ln
- baan iv end of life upgrade options
- how to upgrade baan iv to infor ln
- baan iv to ln data conversion

## Applies To

Baan IV / Baan IVc source environments, Infor LN 10.x target (Classic or Enterprise Edition)

## Steps

### Plan a Baan IV to Infor LN migration

**Items:**

Inventory every Baan IV customization, custom sessions, modified DAL scripts, custom tables and custom reports, and classify each as still needed, replaceable by LN standard functionality, or obsolete.

Inventory third-party and custom integrations connected to Baan IV, such as EDI or bolt-on reporting, and confirm an equivalent exists or can be rebuilt on LN, ideally using ION.

Choose the target LN edition, Classic 4GL runtime or Enterprise Edition Java runtime with LN Studio and DAL2, based on your customization strategy and available skills.

Set up a clean LN environment and use Infor's data conversion tooling to migrate master data, items, BOMs, routings and business partners, along with required open transactions.

Rebuild required customizations on LN rather than assuming Baan IV DAL code ports directly; anything targeted for Enterprise Edition should be rebuilt as DAL2.

Reconfigure security, authorization groups and menu structure, since Baan IV's authorization model does not map one-to-one onto LN.

Run parallel testing: process a representative set of real transactions, order to cash, procure to pay, an MRP run, in both Baan IV and the new LN environment and compare results.

Train end users on changed session layouts and navigation, since even equivalent functions often look and behave differently between Baan IV and LN.

Plan the cutover with a clear data freeze point, a final delta conversion, and a documented fallback plan in case critical issues surface right after go-live.

## Sections

### Why this is not a simple upgrade

**Body:**

Baan IV and Infor LN are architecturally different enough, in data model, session technology and, for Enterprise Edition, a completely different Java runtime versus Baan IV's 4GL, that there is no automated in-place upgrade path between them.

Treat the project like a new implementation with a dedicated migration workstream, its own timeline and its own budget, rather than something that fits inside a normal patch cycle.

### Data conversion realities

**Body:**

Master data, items, BOMs, business partners, generally converts with reasonable effort using conversion tools and field mapping. Open transactions, partially shipped orders, in-process work orders, are harder to convert cleanly.

Many projects choose to close out or complete as much as possible in Baan IV before cutover, rather than converting messy in-flight transactions, to keep the converted dataset simpler and easier to validate.

### Customization rebuild, not lift-and-shift

**Body:**

Baan IV DAL scripts do not run unmodified on LN. Each customization needs to be re-evaluated against current LN standard functionality first, and a surprising number turn out to no longer be necessary because LN's standard sessions already cover the gap.

Only the ones still needed should be rebuilt, either as classic DAL on LN Classic or as DAL2 in LN Studio on Enterprise Edition, treating each as a small development task rather than a copy-paste port.

### Parallel testing and cutover

**Body:**

Run enough real transaction volume through both systems in parallel to catch differences in calculated results, costing, taxes, MRP output, before go-live rather than discovering them in production.

Treat the cutover weekend as a project in itself with a clear rollback trigger defined in advance, since going back to Baan IV after data has diverged in the new system is expensive and disruptive.

## Pitfalls

- Assuming Baan IV DAL customizations will just run on Infor LN without review.
- Underestimating how much of the Baan IV authorization and security setup needs to be redesigned rather than copied.
- Converting every open transaction instead of closing out what can reasonably be finished in Baan IV first.
- Skipping parallel testing on calculation-heavy processes like costing and MRP, where differences only show up under real data volume.
- Treating end-user training as an afterthought when session layout and navigation genuinely change between Baan IV and LN.
- Not defining a rollback point before cutover weekend, leaving no safe way back if a critical issue appears.

## Ai Angle

During the customization inventory step, a grounded AI assistant can be pointed at the Baan IV codebase and quickly classify which custom sessions and DAL scripts already have an equivalent in standard Infor LN functionality, giving the project team a first-pass rationalization list instead of starting that review from a blank spreadsheet.

## Faq

### Can I upgrade Baan IV directly to Infor LN?

**Answer:** No, not as an in-place technical upgrade. Baan IV to Infor LN is treated as a migration and re-implementation project, with data conversion, customization rebuild and parallel testing, because the underlying architecture changed too much for an automated upgrade path.

### Is Baan IV still supported?

**Answer:** Baan IV is a legacy product well past its original release era, and organizations still running it should treat ongoing support and skills availability as a real risk regardless of any vendor's specific support policy at a given time, which is a strong driver for migration projects.

### Should I go to LN Classic or LN Enterprise Edition?

**Answer:** It depends on your customization strategy and available skills. Enterprise Edition, with its Java runtime, LN Studio and DAL2, is Infor's current development direction and generally the better long-term choice, but the right answer depends on your specific customization footprint and team.

### How long does a Baan IV to Infor LN migration typically take?

**Answer:** It varies widely with customization footprint and data complexity. Treat it as a multi-month implementation project with dedicated data conversion and testing phases, not a weekend upgrade, and scope the timeline from an actual assessment of your environment rather than a rule of thumb.

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