Hi

I have a strange problem with Excel VBA -code. When I try to enable the
textbox in userform called 'Parameters' I sometimes get the run time error
'-2147352571'. When I look the debug the Excel tells me that the object
variable or with block variable is not set in the following statement
Parameters.TextBox1.Enabled = True.

The interesting part is that the code works sometimes and sometimes not. For
example I have noticed that the code stops to work if I haven't used the
Excel in ca. 10 minutes. In addition, it seems that the program doesn't work
if I have multiple Excel files simulatiously open.

I would appreciate all your comments because I cannot solve this problem.

Best regards
Vepa