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Overlay tools fail with the following error message:
"Invalid column definition[geoprocessing_SDE_Featureclass_Field_1 exceeds the maximum column name length of 31.]"
When using the buffer command, or any of the overlay tools, if the same field name is in more than one input the field names are differentiated in the output by concatenating the input field name plus the fully qualified table/featureclass name. In some cases it is possible to exceed the 31 character limit of the underlying database.
Follow the steps below.