LostPhysicist

Most interesting, i just tried the same script again on two MCC USB-1208HS-4AO, same PC... as before and now the ''Error 1: invalid Boardnumber ''occurs. If I change the second board number to 0 aswell the error 1 vanishes and the ''Error 22: Background operation already in progress'' ocurrs, whiche is plausible, since i have overwriten boardnum 1 with 0 too. But why is 1 not valid in the first place. Thanks for your help. Kind Regards

Hi, I am using the MCC USB-1208HS-4AO curruntly i am using windows 10 Pro instacal: 6.74.. but curruntly i am creating the daq with the python comand mcculw: 1.0.0 And my script worked with your devices and settings so far ? Kind regrads

Hello, i would like to use multiple daq-crads which run in parallel in analog scan mode/analog output. And for simplicity of the programm i thought that i just run the ul.a_in_scan with multiprocessing. The problem now is that in the individual processes the memhandle i reserved with ul.scaled_win_buf_alloc(total_count) seems to be invalid (so it says in the errorcode: mcculw.ul.ULError: Error 35: Pointer is not valid.). In the singel card programm i wrote for just one cards use with out any parallelizing it works quit well. Are there some limitation with ul.libary refered to parallelizing. I even tried a lock but it doesnt work. Or has any one experience with multiprocessing with the ul.libary Thanks for your help in advance input_mulitcrads_inprogress.py