# Infor LN Item by Business Partner Session: Where It Is and How It Links Data

> Source: https://netray.co/erp-help/infor-ln-item-by-business-partner-session
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: ERP Help

## Short answer

In Infor LN, item data per business partner lives in purchase and sales item sessions that tie an item to a supplier or customer with partner-specific data such as the partner's item code, prices and lead times. Find the exact session with the session search for your package.

## Kind

how-to

## System

infor-ln

## Erp

Infor LN

## Module

Common / Purchase / Sales Item Data

## Query

infor ln item by business partner session

## Alternate Queries

- infor ln item supplier session
- infor ln item sales business partner
- ln item purchase business partner data

## Applies To

Infor LN 10.x. Session codes and names vary slightly by version, so confirm in your environment.

## Steps

### Find and use the session

**Items:**

- Use the application menu search or session search and type item plus business partner to list candidate sessions.
- For supply side, open the item purchase business partner session, commonly in the Purchase Control module with code starting tdipu.
- For demand side, open the item sales business partner session, commonly with code starting tdisa.
- Specify the item and business partner, then fill in the partner's item code, lead time, order unit and minimums as needed.
- Check the default business partner at item purchase data so ordering picks the right supplier.
- Save and test by creating a purchase or sales order line and confirming the partner data defaults in.
- Use the session's zoom or related actions to jump to price books and agreements.

## Sections

### What the link does

**Body:**

Item master data says what the item is. Item by business partner data says how a specific supplier or customer deals with it: their part number, their units, their lead time and often their price source.

Without this record, orders fall back on general defaults, and you cannot print the partner's own item code on documents.

### Finding the exact session code

**Body:**

- Session codes begin with a module prefix, for example td for Order Management and Purchase and Sales sub areas. The in-app session search is the most reliable way to confirm names and codes in your release.
- Because naming differs between versions and customizations, verify the code before documenting it internally.

### Data quality

**Body:**

- Duplicated or missing partner records cause wrong defaults. Run periodic checks for items with no supplier, or active suppliers with no valid price.

## Pitfalls

- Assuming one session covers both purchase and sales.
- Leaving the default supplier blank.
- Not maintaining the partner item code, breaking printed documents.
- Copying session codes from another version without checking.

## Ai Angle

An assistant grounded in LN can answer which items have no purchase business partner, list a supplier's items with lead times, and show the query. It is read-only and can run on-prem.

## Faq

### What is the session code for item by business partner in LN?

**Answer:** Purchase side sessions typically start with tdipu and sales side with tdisa, but the exact code depends on version. Use session search in your system to confirm.

### Where do I set the default supplier?

**Answer:** In the item purchase data and the item purchase business partner records. Check the default business partner field there.

### Can I store the customer's own item code?

**Answer:** Yes, in the sales business partner item data, so it prints on documents.

### How do I list items without suppliers?

**Answer:** Use a query or report over the item purchase partner table, or ask an assistant grounded in LN data.

## Search terms

infor ln item by business partner, infor ln item supplier session, infor ln tdipu, infor ln tdisa, infor ln purchase item data, infor ln sales item data

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