WaitForStrings TypeError in Python

[Ginfizz]

This is occurring in Python. When trying to use WaitForStrings I keep receiving a TypeError which reads as follows:

Error: an integer is required

Line 6

My code is as follows:

result = int(crt.Screen.WaitForStrings(">","#"))
crt.Screen.Send(str(result))

the first line is line 6, the offending line. The error persists if I add a timeout value as well.

Does anyone know why this is happening?