#28 Problem opening audio file

[Anonymous]

When trying to open an audio file I get the following error.

syntax error in expression "exp(0/10.0*log(10.0))": missing close parenthesis at end of function call
syntax error in expression "exp(0/10.0*log(10.0))": missing close parenthesis at end of function call
while executing
"expr exp($val/10.0*log(10.0))"
(procedure "NewGain" line 5)
invoked from within
"NewGain 0"
(procedure "EmptySignal" line 39)
invoked from within
"EmptySignal"
(procedure "NewTrans" line 18)
invoked from within
"NewTrans"
(menu invoke)

Sometimes opening the file wrks, but usually it doesn't. I'm using 1.5.1 for windows.