This item has been identified as an outstanding known issue. A workaround is provided until the issue is officially fixed.
Generating comparison report will fail with below message:
Model Comparison Failed
An internal error occurred while comparing these revision tags. Please contact Anaplan Support.
Above reproduces when Notes column in line item is compared under below condition:
This does not occur when the text is in Notes at the module level.
Remove the JSON string from Notes
If this workaround is not suitable in your use case, please contact Support at firstname.lastname@example.org.
Internal Reference: ALM-1362