I append features from one class to other (using arcpy.Append_management including FieldMappings). The issue is I overshoot the length of target field. I do wonder why Append_management does not deal with such issue, anyway...
For now I can increase the length of target field which fixed the issue. But I still need somehow check the length of input string. And do sub-string if needed so the tool won't crash whenever there too long string in input data. Any simple way to achieve this?