DMD.SeqPut error

Created by: zcshinee

I am using the example code you provided to test the DMD (Vialux V-9001 with ALP 4.3). However, I ran into an error with the DMD.SeqPut function shown below. I am using python version of 3.6.5. Could you kindly let me know how to troubleshoot this? Thank you.

Loading library: C:\Program Files\ALP-4.3/ALP-4.3 API/x64/alp4395.dll
DMD found, resolution = 2560 x 1600.
Traceback (most recent call last):
  File "c:/Users/cheng/ALP4lib/demo.py", line 21, in <module>
    DMD.SeqPut(imgData=imgSeq)
  File "c:\users\cheng\alp4lib\src\ALP4.py", line 651, in SeqPut
    'Cannot send image sequence to device.')
  File "c:\users\cheng\alp4lib\src\ALP4.py", line 431, in _checkError
    raise ALPError(returnValue)
ALP4.ALPError: Error accessing user data.