PolSARpro v.6 Missing operand Error

Dear PolSARpro team,

I am getting this error below, how can i fix this.

missing operand at @
in expression “round(150 * @)”
missing operand at @
in expression “round(150 * @)”
(parsing expression “round(150 * )”)
invoked from within
“expr round($geowidgetheight * $WidgetSizeRatioHeight)”
(procedure “WmTransient” line 71)
invoked from within
“WmTransient .top7 $PSPTopLevel”
(“eval” body line 452)
invoked from within
“eval {global PSPTopLevel PSPBiomassFunction DataDirInit DataDir DataDirChannel1 DataDirChannel2 ScreenRatio
global OffsetLig OffsetCol FinalNlig Final…”
(“uplevel” body line 1)
invoked from within
“uplevel #0 [list eval $cmd]”
(procedure “vTcl:DoCmdOption” line 16)
invoked from within
“vTcl:DoCmdOption .top00.fra217.but218 {global PSPTopLevel PSPBiomassFunction DataDirInit DataDir DataDirChannel1 DataDirChannel2 ScreenRatio
global Of…”
invoked from within
“.top00.fra217.but218 invoke”
(“uplevel” body line 1)
invoked from within
“uplevel #0 [list $w invoke]”
(procedure “tk::ButtonUp” line 22)
invoked from within
“tk::ButtonUp .top00.fra217.but218”
(command bound to event)