Input data are in fgdb_1. Ouptut data will be in fgdb_2 which is acctually copy of fgdb_1. One of columns (attributes) is Shape_Length with already known values. In my workbench I am doing some string manipulation and populate some another attribute. Output values for this attribute are being populated without any problem as well as others without changes, except Shape_Length attribute which now has value <Null> for all objects. Right before writing output data I inserted Inspector to check If there is still values for Shape_Length, and yes, values are there. But after writing to fgdb they dissappear. Where is a problem, why values for shape_length are lost? Tips? Database overwrite is set to NO, transaction type is transactions, table drop no, table truncate yes, attribute names are the same of course, i don't know..