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Ubertooth bash script returns DLT_USER error

Previous: Answer by NikoJako for I"m setting up an Ubertooth to capture BTLE packets and display them in WS as per this tutorial in a bash script. Scroll towards the bottom of the link provided, looking for bullet point #5 in the "Sniff Bluetooth LE Packets" section, that is what I'm going off of. This has worked for me in the past and I wanted to improve upon it by adding the following:#Global Variables dlt_user="uat:user_dlts:\"User 0 (DLT=147)\",\"btle\",\"0\",\"\",\"0\",\"\"" ... ... ... sudo wireshark -k -i /tmp/pipe1 -o $dlt_user & The script fails at this line and stderr reports the following:wireshark: Invalid -o flag "uat:user_dlts:"User": user_dlts:2: expecting field encap in previous line Searching online returns NOTHING about the issue, which makes me think everyone knows something I don't. Please advise. sudo wireshark -help returns: WireShark 2.6.7 (Git v2.6.7 packaged as 2.6.7-1-deb9u1)uname -a returns: Linux pdcontrol 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u2 (2019-11-11) x86_64 GNU/Linux
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I"m setting up an Ubertooth to capture BTLE packets and display them in WS as per this [tutorial](http://www.secuid0.net/?p=471"Sniff Bluetooth LE Packets") in a bash script. Scroll towards the bottom of the link provided, looking for bullet point #5 in the "Sniff Bluetooth LE Packets" section, that is what I'm going off of. This has worked for me in the past and I wanted to improve upon it by adding the following: #Global Variables dlt_user="uat:user_dlts:\"User 0 (DLT=147)\",\"btle\",\"0\",\"\",\"0\",\"\"" ... ... ... sudo wireshark -k -i /tmp/pipe1 -o $dlt_user & The script fails at this line and stderr reports the following: wireshark: Invalid -o flag "uat:user_dlts:"User": user_dlts:2: expecting field encap in previous line Searching online returns NOTHING about the issue, which makes me think everyone knows something I don't. Please advise. sudo wireshark -help returns: WireShark 2.6.7 (Git v2.6.7 packaged as 2.6.7-1-deb9u1) uname -a returns: Linux pdcontrol 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u2 (2019-11-11) x86_64 GNU/Linux

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