Agilent 3499 driver trouble

[AzQ]

Hi,

I need to use the 3499A Switch Scanner to do measurements with a 4284A
LCR meter.

Using a LabVIEW program, I have already completed the program used to control the
4284A and I successfully tested it with a direct connection with my samples.

Now, I need to do sample measurements by selecting each sample one by
one. I tried to do so with a LabVIEW program using the 3499A Switch
Scanner's LabVIEW driver and also by sending LabVIEW VISA instructions
to the Switch Scanner.

I previously used an other programming language to do so. I was using
the same 3499A Switch Scanner but with a VEE program which is running
perfectly well. However, the VEE program is considered too old now at my work and I
need to replace it with LabVIEW.

When using the Switch Scanner's LabVIEW driver, I have several problems:

1. After the first execution of the program, it crashes when I try to
run the code for a second time. I mean, if I start the program again,
the execution stops at the first 3499A VI instruction (in my case it is
the ''initialize'' VI, the execution stops at this VI until an error
occurs for timeout). To execute the program again, I need to turn off
and on the instrument by myself with a physical interaction.

2. I am not totally sure how to write the connecting channels names in
the driver as I can't find details about this in its VIs' detailed
descriptions. I tried to guess the ''COM'' and ''CH'' keywords found in
the user manual and checked the old connections done by a previous
worker who did the setup of the 4284A-3499A.
Unfortunately, regardless the names I input, I cannot achieve any
connection and the LCR meter seems to not do measurements.


When trying to use the VISA instructions:

1. There is no crash happening when I start running the program (which
is good).

2. But...in this case, I used similar commands than those I found in the
old VEE program. There is also a list of the channels names in the VEE
program that I copied for the LabVIEW program using VISA. Unfortunately,
it seems that as in the previous case, no effective connection occurs in
the Switch Scanner and I cannnot do measurements with the LCR meter.

*I used channels names defined as snm like for example by sending 
commands such as ROUT:CLOS (@102) but it is not working

* By using the driver I try to connect only 1 sample which has 4 connecting wires. 
By using the VISA instructions I try to connect my 16 samples with 4 wires each. 
I joined my 2 labVIEW codes in the mail.

 Thank you for your help,