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VISA Open Issue for R&S FSH4 Spectrum Analyzer

I am trying to control and configure FSH4 Spectrum Analyzer from LabVIEW. I have installed the LV 2015 rssafsup driver from the link below: 

https://www.rohde-schwarz.com/us/driver/fsh/

I am using LV 2020 64 bit. 

The instrument is successfully detected in NI MAX and session gets validated. 

However, when I use the initialize VI from rssafsup pallete, it either hangs at "VISA open" or times out with the following error: 

Error -1073807339 occurred at rssafsup_rsidr_core.lvlib:_io_read.vi

Possible reason(s):

VISA read operation resulted in timeout. VISA timeout is set to 10000 ms. This usually indicates a problem with instrument not responding to a query. Changing VISA timeout to higher value is only recommended in special cases. For operations taking a long time the driver uses OPC timeout (currently set to 30000 ms).

Debug info:
OS: Windows 10 Home en
LabVIEW: 2020 64-bit Development System
Driver: rssafsup ver. 1.71.0 (core ver. 6.31.0)
Complete call chain:
rssafsup_rsidr_core.lvlib:->
_io_read_errors.vi
_io_read.vi
io_query.vi
_io_get_StatusByte.vi
io_clear_before_read.vi
rssafsup Initialize with Options.vi
rssafsup Initialize.vi
Untitled 2

Any idea what's going wrong?

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