DigitalIn_ScanScreen index error

[lauren1]

When running DigitalIn_ScanScreen.py  (waveformsSDK sample script) I got the following error. 

line 95, in <module>
rgb[i] = c + 0.8*((rgSamples[i]>>c)&1)
IndexError: invalid index

 

Does anyone know how to fix this? 

Edited February 22, 2023 by lauren1

[artvvb]

Hi @lauren1, welcome to the forums.

The index into either the rgb array or the rgSamples array is exceeding the size of the array. The index is limited by the number of valid samples in the acquisition buffer, which ought to be less than the size of the buffer. FDwfDigitalInStatusSamplesValid is presumably returning a nonzero value for the error to be showing up at all, so it seems like some data has been acquired. Presumably, a device is getting opened since you aren't getting stopped around line 40.

A couple of questions that might help me reproduce:

Have you made any modifications to the example? What version of python are you using, and what hardware are you using? What version of WaveForms?

Thanks,

Arthur