OrderAirlock[ ≡ ] ANSI X12 355 PO AIRLOCK
← All 15 Wholesale ERP & EDI Import Error Guides · Epicor Prophet 21 SISM
ERR-04 • P21-SISM-IMPLNE-UOM-UNIT-SIZE-ERR • GATE 3 — ANSI X12 DE 355 UOM PACK-SIZE ARITHMETIC

Epicor Prophet 21 (P21) SISM IMPLNE 'Unit of Measure Not Valid for Item' Fix

Target ERP / Standard: Epicor Prophet 21 (P21) SISM · Deterministic Compiler Profile: epicor_p21_sism

AUTOMATED PRE-ERP QUARANTINE & TRANSPARENT PRICING

OrderAirlock blocks P21-SISM-IMPLNE-UOM-UNIT-SIZE-ERR deterministically with zero LLM calls before bad quantities or prices enter Epicor Prophet 21 (P21) SISM. Starter: $249/mo ($2,490/yr annual, 500 POs/mo) · Distributor & FDE Pro: $499/mo ($4,990/yr annual, 2,500 POs/mo) — 0% transaction cut.

Run <60s Broken-PO Sandbox (/desk)Inspect Live Split-Screen WorkbenchView $249 / $499 Plans
Automated Fix & Pricing (`OrderAirlock`): Starter $249/mo ($2,490/yr annual, 500 POs/mo) · Distributor/FDE Pro $499/mo ($4,990/yr annual, 2,500 POs/mo) — compiles verified IMPHDR/IMPLNE SISM drops in base stocking UOMs with zero paid Epicor Transaction API license required.

Direct Root Cause & Fix: Epicor Prophet 21's Scheduled Import Service Manager (SISM) rejects an entire IMPHDR/IMPLNE sales order batch when unit_of_measure on an IMPLNE row (e.g., BX or CS) is not explicitly attached to that item_id inside P21 inv_mast / item_uom. Convert pack quantities into P21's base stocking unit_of_measure (unit_quantity + 4-decimal unit_price) prior to dropping the SISM file.

Why SISM Fails Silently in Batch Drops

When SISM polls a watched folder, a single IMPLNE line carrying unit_of_measure=CA when P21 only defines EA (unit_size=1) and CS (unit_size=24) moves the import file into the .err directory and leaves inside sales unaware until the contractor calls for a tracking number.

Deterministic Fix for IMPLNE Drops

  1. Map customer UOM synonyms (CA, CTN, CASE) to the exact P21 stocking UOM (EA) or configured item_uom code.
  2. Populate record_type=IMPLNE, company_id, customer_id, po_no, item_id, unit_quantity (base units), unit_of_measure, unit_price (toFixed(4)), extended_price (toFixed(2)), and preserve the buyer's raw SKU in customer_part_no.
RAW BROKEN INBOUND PAYLOAD (QUARANTINED)
IMPLNE,10,CUST-1042,PO-8841,2026-11-11,75201,1,COP-ELB-34,3/4 Copper Elbow,4,CARTON,36.00,144.00,ELB34
ORDERAIRLOCK VERIFIED EPICOR_P21_SISM OUTPUT
IMPLNE,10,CUST-1042,PO-8841,2026-11-11,75201,1,COP-ELB-34,3/4 Copper Elbow,48,EA,3.0000,144.00,ELB34
COMMON PRACTITIONER DIAGNOSTIC QUERIES
  • Epicor Prophet 21 SISM IMPLNE invalid unit of measure item_id
  • P21 Scheduled Import Service Manager unit_of_measure unit_size error
  • automate Epicor P21 sales order import without Transaction API license
RELATED EPICOR PROPHET 21 SISM IMPORT GUIDES
ERR-05: Epicor P21 SISM 'Item ID Not Found in inv_mast': Resolving Missing Customer Part X-RefsERR-06: Epicor P21 SISM Contract Price Discrepancy & Extended Price Rounding HoldsBrowse all 15 ERP & EDI Import Error Guides →