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Cannot edit decision table in Excel beyond 256 columns



Unable to edit a decision table in Excel that has more then 256 columns. This is a limitation in Excel 2003 that does not allow editing beyond column number 256. However, this issue is also observed in the later versions of Excel.

Error Messages

Not Applicable

Steps to Reproduce

  1. Create a decision table with more then 256 columns.
  2. Attempt to edit in Excel.

Root Cause

A defect in Pegasystems’ code or rules which incorrectly enforces the limit based on Excel 2003.


This issue is scheduled to be resolved in Pega 7.2.

Suggest Edit

Published January 31, 2016 - Updated October 8, 2020

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