too many parameters on command line

Variable index2 = 0
String boxcontent = ""
	
	for (index2 = 0; index2 < length; index2 +=1)
		String path2 = StringFromList(index2, outputPaths, "\r")		
		Open /R refNum as path2
		if (index2 == 0)			
			String buffer
			Variable lineNumber = 0
			do
				FReadline refNum, buffer
				if (StringMatch(buffer, "IP*"))		
					String regExp = "(IP)(\\s+)(\-?[[:digit:]]+\.[[:digit:]]+)"
					String parameter, space, number
					SplitString /E = (regExp) buffer, parameter, space, number			
					Variable IP = str2num(number)-Fc	// Fc is a variable generated above
					String sIP = num2str(IP)	                         // sIP is the string "-1" here
					String newvalue
					sprintf newvalue, "IP: ", sIP
					boxcontent += newvalue
				endif
			lineNumber += 1
			while (lineNumber <= 46)			
		endif
		
	endfor