sorry, yes, its the pfm2/dx7 directory. I re-downloaded and extracted the sysex tar and put the contents in pfm2/dx7 without the additional patches I had in there earlier and it works now. The problem may be the first patch from the group "DX7EXTRA" which is called $m3.syx. It looks like the directory scan is interrupted by the $ and it won't find any files after that.
Ah i see... thanks for the report.
Tip for the DX7 patches, if you have a saturated sound, look at the upper oscillator number (ENG button + Menu), set it to "SIN" if it's not already and reduce the frequency.
Having frequency = 16 at level 3 or 4 works with the DX7 not with the PreenFM.
I'll try to automate this in a future update.
XAvier