ERROR: AV's and IWButton.picture.data: the parameter is incorrect

[MrSpock]

So I have moved all variables from section
implementation=>var
to
form class=>public

and changed all procedures and functions to
form class=>public
in a very well known way

altogether it took less than half an hour.

Now two sessions in two browsers seem to work independently from each other. The problem is solved.
This was probably so obvious that it had not been mentioned in intraweb manual.