General Questions

UPC and MPN are not always in Cart2Cart’s default product field map for every Source→Target pair. If they did not appear on the Target store after an osCommerce migration, the fields likely need an explicit mapping or a custom migration.

UPC / MPN after migration (current)

1. Confirm where UPC/MPN live on the Source (core product fields vs custom attributes) and which Target fields should receive them (SKU, EAN, UPC, MPN, metafields, etc.).

2. Check the Demo Migration sample products. If values are missing, contact Cart2Cart support (Live Chat / ticket) and request field mapping or a custom migration.

3. Do not assume every Target cart has native UPC and MPN columns—some platforms store them only as attributes or apps.

4. After a custom mapping is applied, re-run Demo before Full Migration.

Earlier explanation (legacy)

Older copy noted that automated migration may omit UPC/MPN for pairs such as osCommerce → Pinnacle Cart by default, and that a custom migration can include those fields.

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