Test and Measurement Forum

Hi
I am trying to run a 4424 over vb.net, but when I call ps4000_GetTimebase, the PICO_STATUS returns the error code 38 (or 26hex), apparently meaning "The memory index is out of range"
What does this mean, and what can I do about it?

The values returned by GetTimebase(handle,timebase,samples,time_interval,1,max_samples,1)
are
(1,21,10000,0,1,0,1)

This code works perfectly in the ps4000.xls example, but not when i update it into .net

Any ideas?
Thanks

Hi

That error code doesn't sound right. Are you sure your data types are correct (data types are different in Excel and .net)?

Robin

Okay, I've updated all of the data types to those specified in the ps4000pg.pdf and I've also ensured that I have updated the appropriate "byval"s to "byref"s to update to .net, but I still get
pico_status = 38

I may have been mistaken in saying that this corresponded to "The memory index is out of range"- there is no definition of error code 38 so I assumed I would have to convert to hex, which is 26: memory index out of range.

The values returned by GetTimebase(handle,timebase,samples,time_interval,1,max_samples,1)
are
(1,21,10000,0,1,0,1)

Did you try changing the last input parameter (from 1 to 0)?

Yes, I've tried changing the segment index- although now it needs to be "Convert.ToUIint16(0)" rather than just "0"...

No difference though.

Hi

What is your status variable declared as? It should be signed 32 bit (a long in .net is 64 bit)

Robin

Ah- while my status variable was set okay (integer), some of my other data types were wrong- I was using longs where i should be using integers. Turns out you were right with your first reply!
Thanks for the help