Brian Dunning's Error Code Reference

FileMaker Error 201

Field cannot be modified



Erik Andreas Cayré   Erik Andreas Cayré
Apr 26, 2018
Can also be caused by connection to a hosted file being lost while a script Is trying to modify a field…
Sam Barnum   Sam Barnum, 360Works
Mar 3, 2008
Can be caused by field-level permissions on a table. If a CWP request tries to write to a field which is "read-only" filemaker will return an error code 201