Using the NI tkds 30xx library, but there is a problem with acquiring waveforms

When I try to use the Initiate Acquisition function that is part of this library, I get the following error message: "the given session or object reference is invalid." The name of the device (created by the "initialize" function) seems to be correct (when I probe it). It is: "GPIB::1::INSTR 4". Does anyone know how to fix this?
Sean

Hi Sean
find attached an example, how I've initialized
TEKTRONIX TDS7054 DPO-scope. It was made for
a special application - should demonstrate,
how the address has to look like......
( at that time as I made it, was no driver available
from Tek / Natinst - thatswhy I have reused one )
regards
wha
Attachments:
tds7xx_init.zip ‏128 KB

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