Hi there,
I have an attribute table and have added a new field (AQU_PIPE_NAME).  To populate its selected fields, I would like to set it equal to the selected values in another field of the same table (EXTENSION).  I have made only the selected fields visible.  I ten right click on AQU_PIPE_NAME and click on Field Calculator.  I set the following operation:  AQU_PIPE_NAME = [EXTENSION] and receive the following error message: 
"There was a failure during processing, check the Geoprocessing Results window...
Calculate Field [133038_10132011]
ERROR 000732 Input table does not exist or is not supported
Its a simple file .gdb attribute table.  Not sure why it wouldn't be supported.   No subtypes exist on this table and I made sure.
Helllp!
Christi