need some help with baseConvert()

[Tiemo Hollmann TB]

Hello,

I am using:

put baseConvert(number,32,10) into tResult

where "number" can be numeric or alpha input by the user. When "number" is
"AB" the result is 331, ok. But when "number" is e.g. "QW" I get an error
"baseConvert can't convert this number"

I would like to check the user input for valid values which can be converted
by the function, before I  pass it to the baseConvert(), and the function
throws this error to the user.

What is the valid range for this baseConvert? Any help appreciated.

Tiemo