VWAP efs Error loading

[venture99]

My VWAP2 efs (also the other VWAP) comes up in chart with formula error. No line number of error is displayed. I have had this working fine, then I reverted to previous version of esignal. Now using 7.9 build 719 was using 7.91. (I was told that the B719 is latest build before 8.0 . 8.0 causes major failures for me). I have the latest amstudies.efslib loaded in functionLibrary folder.
Is this a backwards incompatability issue or ....?
Regards, Will

[ACM]

Will
You need eSignal version 7.9.1 (or later) to be able to run those studies. This is because some of the functions used in the amStudies library were not available in earlier versions. FWIW this is indicated in this post
Alex