Still investigating this, but on consulting with colleagues, it seems a common problem in this particular environment. Using a batch file stored in my user folder to run PB10.5 and that's my workaround at present. Will dig further when I get some time.  Software should not suddenly stop working:-)

Hi Kevin,

Thanks for this. I do have a memory of reading something like what you referred to, but alas I am on not using a touchscreen. t

There is something not quite making sense to me. If I navigate to a .pbw and attempt to open PB as a suggested app it fails, but then when I ignore the suggestion and navigate to the PB105 exe, PB loads up ok.  However, if I navigate directly to the PB105 exe in File Manager and attempt to run it again gives me the "Failed to Initialise" message 

Seems that there is something odd about finind the IDE dlls as Chris suggested. Not sure what though.

Davy

I forget the exact error message so this might be way off, but are you using a touchscreen device?  There was an issue starting PB (not sure if it went all the way back to 10.5 but maybe) when using a touchscreen.  I'd have to search for the solution but you basically had to turn off one of the touchpad services and then it opened fine.  Again I could be way off but I vaguely remember something like that.

Kevin

Hi Davy;

   Before that ... are the PB IDE's run-time  DLL load locations still in the O/S's "System Path"?

Regards ... Chris