I am trying to modify the packing list RTM T6soc4.rtm and whenever I add a new datafield and save, a trial print under TAS6EVO fails to show the list screen after going through the setup of the packing slip screen in  
SO-C. I have to restore a backup version to get it back.
I am particularly interested in printing a UPC code and tried to select the data field in the inventory master that contains the code.

after modification (adding a datafield like the barcode) and saving I tried to print a packin listfrom the TAS6EVO screen. It shows the setup screen for the P/S print and i went through all the parameters. At the it showed me the little screen that gives me the choice of RTM and after that nothing happened.
Yes, I am using the TAS6 version of form editor and T6SOC4.RTM