Unexpected Window

The script is in jscript and is not executing while stucked at one point. It is saying the error as Unexpected window but the window is mapped the additional details are below;





Tested
object:

Aliases.MRMPlus2.frmLookupTable.sdgLookup.Plus2

(Sys.Process("MRMPlus2").VBObject("frmLookupTable").VBObject("sdgLookup").Window("SSDataWidgetsEdit",
"", 1))