Unable to communicate with equipment using GPIB-USB-HS

[Alezin10]

Hello community!

I am currently using a gpib-usb-hs to communicate with my Agilent 6611C via python but when I run the code I get the following error:

"pyvisa.errors.VisaIOError: VI_ERROR_INV_SETUP (-1073807302): Unable to start operation because setup is invalid (usually due to attributes being set to an inconsistent state)."

Code used: 

import visa

rm = visa.ResourceManager()

dev = rm.open_resource('GPIB0::0::INSTR')

print(dev.query("*IDN?"))

Has anyone come across a similar issue and have been able to solve it?

Thank you in advance for the attention!

[cstorey]

Can you communicate with the device via NI-MAX?

Is the GPIB address really 0?   ( 0 is allowed just uncommon.) 

Does this instrument need a secondary address?   GPIB0::0::2::INSTR?  Some PSU are chainable and have secondary address you need to use to address them.

Should you have a termination character with that "*IDN?"  like "*IDN?\r".

I haven'r used PyVISA in a long time, and you are likely to get better answers on its use elsewhere.

[Minions]

Typically your GPIB0::0 is the controller and it will not respond to a command to itself.  Do you know the address of your controller?  Can you Poll for instruments on the GPIB0 bus?  It may give you the answers or at least a direction to follow.

Additionally, older pieces of equipment or firmware will not respond to the "*IDN?\n", but will to the previous "ID?\n".