Free Software to open UE QCAT files

Tools
1

Hi Experts,
I would know if someone have maybe tried.
I have no license for QCAT, the UE log files are opened by QCAT app and not Wireshark.
So what could I do to open UE QCAT files?
(I don’t have QCAT app)

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2

You would need to open first in QCAT and then you can convert to PCAP files.

UE logs can’t be opened directly in Wireshark.

3

Hi bro, tried to use the tools→ converto to pcap but generated empty text file. Is there any other requirements , maybe license or something else?

4

The empty output isn’t a license problem — QCAT’s Convert to PCAP only writes the OTA signalling messages (RRC/NAS) it finds in the log. If the diag log was captured without the OTA/signalling log masks enabled, there’s nothing to export → empty file. Also check the Generate-PCAP dialog actually has the technology (LTE/NR) ticked; if none is selected it produces an empty file too.

Fastest fix is to skip QCAT entirely and use SCAT (free, open source — GitHub - fgsect/scat: SCAT: Signaling Collection and Analysis Tool · GitHub ). It reads Qualcomm qmdl / qmdl2 / dlf dumps and writes a GSMTAP pcap straight into Wireshark. For an already-captured file:

python3 scat.py -t qc -d yourlog.qmdl -F out.pcap

Three things that trip people up:

  • Wireshark 2.6+ and install SCAT’s Wireshark Lua plugin — without it, LTE MAC/PDCP and NR frames won’t dissect and the capture looks empty even when it isn’t.
  • NR RRC / NAS-5GS rides on GSMTAPv3, which isn’t merged into mainline Wireshark yet, so the plugin is mandatory for 5G logs — and keep the original qmdl, because the GSMTAPv3 format is still changing.
  • SCAT can’t parse the newer qdss / hdf format some 2021+ chipsets log in. If your file is that format, it’ll also come out empty — confirm you’re on current SCAT master, or re-capture in qmdl.

QCSuper ( GitHub - P1sec/QCSuper: QCSuper is a tool communicating with Qualcomm-based phones and modems, allowing to capture raw 2G/3G/4G radio frames, among other things. · GitHub ) is the other free route — more live-capture oriented, but also produces Wireshark-ready GSMTAP pcap.

If you paste what device/chipset produced the log and the file extension, I’ll tell you which path will actually work for it.