pfcGetProESession().RunMacro('myScript') in for loop return pfcXToolkitGeneralError randomly.

Hello,

we use weblink's RunMacro function to run a script, it search the feature name first to find out the coresponding prt, then switch with the specific Simplified Representations, sometimes it success switch but sometimes return an exception  pfcXToolkitGeneralError, just wanna know if my code structure has any problem, or RunMacro shouldn't be executed within a for loop ?

we use Creo Parametric 8.0.5.0

var macroFixHeader = '';
macroFixHeader += '~ Command `ProCmdMdlTreeSearch`;';
macroFixHeader += '~ Open `selspecdlg0` `SelOptionRadio`;';
macroFixHeader += '~ Close `selspecdlg0` `SelOptionRadio`;';
macroFixHeader += '~ Select `selspecdlg0` `SelOptionRadio` 1 `Component`;';

var macroFixBody = '';
macroFixBody += '~ Activate `selspecdlg0` `EvaluateBtn`;';
macroFixBody += '~ Select `selspecdlg0` `ResultList` -1;';
macroFixBody += '~ Activate `selspecdlg0` `ApplyBtn`;';
macroFixBody += '~ Activate `selspecdlg0` `CancelButton`;';
macroFixBody += '~ Activate `main_dlg_cur` `page_View_control_btn` 0;';
macroFixBody += '~ Command `ProCmdViewRepUserDefine`;';

var macroFixFooter = '';
macroFixFooter += '~ Activate `usrdefitems` `AcceptBtn`;';
macroFixFooter += '~ Command `ProCmdWinActivate`;';

var referenceNameArr = [];//some feature name get from session
for(var t=0; t<referenceNameArr.length; t++) {
	var reference = referenceNameArr[t];
	var macroParamPartName = '~ Update `selspecdlg0` `ExtRulesLayout.ExtBasicNameLayout.BasicNameList` `' + reference + '`;';
	var macroParamSimpRepName = '~ Select `usrdefitems` `ItemsList` 1 `' + simpRepName + '`;';
	var finalMacro = macroFixHeader + macroParamPartName + macroFixBody + macroParamSimpRepName + macroFixFooter;
	pfcGetProESession().RunMacro(finalMacro);//return pfcXToolkitGeneralError randomly
}