ControlInfo / FindValue don't generate variables

Hey!

I tried to make a temporary function to get all checkboxes's names in a window and use them with ControlInfo to get their Titles, so I could use it to change a wave containing this information. The problem is that ControlInfo don't create any variables when executing inside the For loop, neither FindValue. I tested just these commands in the command window, works fine.

It ends up in an error because S_title is empty.

Why these functions don't generate the variables inside the loop? Code bellow:

Function aux()
	variable controlnumber
	variable windex
	variable i
	string controllist
	string controltitle
	string controlname
	wave/T wPDG = root:VarList:wPDG
	
	controllist = ControlNameList("PreDefinedGroups")
	
	for(i=0;ItemsInList(controllist)>i;i+=1)
		if(StringMatch(StringFromList(i,controllist),"group*"))
			continue
		else
			controlname = StringFromList(i,controllist)
			ControlInfo/W=PreDefinedGroups controlname
			FindValue/TEXT=S_title/TXOP=1 wPDG
			windex = V_row
			wPDG[windex][2] = controlname
			wPDG[i][3] = "0"
		endif
	endfor
		
End

Thanks!

ControlInfo/W=PreDefinedGroups $controlname

ControlInfo expects a "name" of the control, not a string. You need the "$" in this case.