Hi, I have used your example userdef function FormatArray() to show the value of multi params selected on a report. However since Q1 2010 some of the reports now show textbox errors at preview/runtime stating "An error has occured while processing TextBox 'TextBox8': The expression contains undefined function call FormatArray()."
It seems to be only if the textbox expression has spaces in between some static text and the function
i.e. "= 'Site: ' + FormatArray(Parameters.paramSite)" fails
but "= 'Site: '+FormatArray(Parameters.paramSite)" works