Resolution:
The Administrator GUI may appear to "hang" when importing a large .csx file.  This is because the Administrator GUI may not have enough memory available to load the file to complete the import process.  To work around this situation:

1.  Stop the Administrator GUI application.
2.  Modify the $TIBCO_HOME/administrator/domain/&ltyour domain name>/bin/&ltyour domain name>.tra file by looking for this line:

java.heap.size.max=512m

modify it to increase the maximum heap size allowed, for instance:

java.heap.size.max=1024m

3.  Restart the Administrator, and re-try importing the file.

NOTE:  If the file loads successfully, the file name in the window will change from "no file" to "&ltyour filename>".  You must then click OK to complete the import process.  You will see the "Please Wait" animated gif while the import is being processed.  Once completed, the Administrator will log off.

Problems when importing a large .csx file into BusinessConnect