Hello everyone, My question relates to the custom component creation using Python Scripting. I am sure you are familiar with this approach but as a recap; 1. Type in the python script to create the needed geometry and save it in CustomScript folder 2. Compile it from autocad plant 3d using PLANTREGISTERCUSTOMSCRIPT 3. test is using TESTACPSCRIPTS method Now, what I want is a way to call some boolean function TEST from a DLL file placed inside CustomScript folder as well and check whether it returned a true or false. so far what I have tried is this; import clr clr.AddReference("SampleDLL") from SampleDLLNameSpace import SampleDLL def SAMPLECODE(ID="SAMPLECODE", **kw): if(SampleDLL.TEST): print("OK") else: print("NOT OK") and import ctypes def SAMPLECODE(ID="SAMPLECODE", **kw): lib = ctypes.CDLL("SampleDLL") if(lib.TEST): print("OK") else: print("NOT OK") When i try and compile the script using **PLANTREGISTERCUSTOMSCRIPT** command, it throws an error in both cases; ModuleNotFoundError: No module named '_clr' ModuleNotFoundError: No module named '_ctypes' So any thought on how can I call the function from an external DLL file. Your help is always appreciated