KB-1947 Importing an application/patch fails with "The uploaded file is invalid (APNX-1-4268-003) (APNX-1-4268-003)" error

Symptoms

Importing an application/patch results in "The uploaded file is invalid" with the following error observed in the application server log:

INFO [stdout] ERROR com.appiancorp.object.action.InspectReaction - The file could not be inspected. docId=****, docName=****, docInternalFileName=****
INFO [stdout] com.appiancorp.ix.ImportFacadeException: The uploaded file is invalid (APNX-1-4268-003) (APNX-1-4268-003)The uploaded file is invalid (APNX-1-4268-003) (APNX-1-4268-003)
...
INFO [stdout] Caused by: com.appiancorp.kougar.driver.exceptions.Signal: length

Cause

This issue has been addressed in Appian 18.3.

Action

Upgrade to the latest version of Appian.

Affected Versions

This article applies to Appian 18.2 and earlier.