Invalid Registration Number

Last Published: April 25, 2020

Error Message

When registering a single use application with an incorrect registration number, the following error message occurs:

"Invalid Registration Number".


UNK numbers for ArcView Single Use, ArcEditor Single Use, and Single Use extensions must be issued for the exact version of ArcGIS being registered.

Upgrading from an older version of ArcGIS requires new UNK numbers.

Solution or Workaround

There are two possible solutions for this problem. First determine which version of ArcGIS is being used by opening the Desktop Administrator and looking on the right side of the screen for Installation Information

  • Request a UNK number from ESRI Customer Service (or matches the appropriate version of ArcGIS and for each extension that will be used.
  • Request an authorization file from ESRI Customer Service (or from tht matches the appropriate version of ArcGIS.

Article ID:000004673

  • ArcMap 9 x
  • ArcMap 8 x

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