If you're trying the new Photometry Transforms Generation Program discussed at the AAVSO meeting (PTGP - at http://www.aavso.org/tg) a problem has been identified. To use the program with your data, all input lines must end with a final delimiter - either a comma or semicolon. For example (compare to Users Guide page 3):
Filter identification line - Filt,b,v,r, (note final comma added)
Date of observation line - Julian_Day;2456628.19110; (note final semicolon added)
Star instrument magnitude measurement line - 112,-7.747,258,-9.436,411,-9.475,415, (again note final comma added)
An updated version 4.1 of the program will be available soon. Changes will include converting to standard AAVSO nomenclature for transforms, adding additional information for stars selected for removal/addition on the transform plots, adding the Tr_vi transform, providing an INI output format line which can be directly input to the TA program, and eliminating the need to have a delimiter at the end of each line.
Also, if someone can provide me a Maxim file for M67 or NGC7790, I'll try to add that input format in the 4.1 release. If not, it will soon follow. Also, the standard deviation error for each transform will be added soon.