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[Bug]: ARB download response parser fails on real SDG #15

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opened 2026-04-18 11:16:14 +00:00 by tgohle · 1 comment
tgohle commented 2026-04-18 11:16:14 +00:00
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Affected version

v0.2

Area

arb

Severity

high

What happened?

HW test update on real SDG2042X:

The original GUI-freeze symptom appears fixed: during ARB download the UI stayed responsive.

However, the download still failed functionally with:
[ERR] ARB download: No SCPI block after WAVEDATA,

Conclusion: threading fix looks good, but the real-device ARB download response parser is still wrong or too strict.

Steps to reproduce

  1. Connect to Instrument
  2. Open ARB and Refresh
  3. Try to download a stored user waveform (e.g. Test_pulse)

Instrument model / firmware

No response

Host environment

No response

Error text / SCPI response / traceback

Integrated terminal shows in V0.2:

ARB download started: USER,Test_pulse ... 
[ERR] ARB download: No SCPI block after WAVEDATA,

Checks

  • I tested this more than once
  • I checked whether this is already reported
### Affected version v0.2 ### Area arb ### Severity high ### What happened? HW test update on real SDG2042X: The original GUI-freeze symptom appears fixed: during ARB download the UI stayed responsive. However, the download still failed functionally with: `[ERR] ARB download: No SCPI block after WAVEDATA,` Conclusion: threading fix looks good, but the real-device ARB download response parser is still wrong or too strict. ### Steps to reproduce 1. Connect to Instrument 2. Open ARB and Refresh 3. Try to download a stored user waveform (e.g. Test_pulse) ### Instrument model / firmware _No response_ ### Host environment _No response_ ### Error text / SCPI response / traceback **Integrated terminal shows in V0.2:** ``` ARB download started: USER,Test_pulse ... [ERR] ARB download: No SCPI block after WAVEDATA, ``` ### Checks - [x] I tested this more than once - [x] I checked whether this is already reported
tgohle added the
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 labels 2026-04-18 11:16:37 +00:00
tgohle self-assigned this 2026-04-18 11:30:18 +00:00
tgohle commented 2026-04-20 10:25:23 +00:00
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Issue #15 update

Tested on real SDG2042X after the ARB rework in v0.2.1.

Original problem

In v0.2 the GUI freeze during ARB download was already fixed, but the actual download still failed on the real instrument with:

[ERR] ARB download: No SCPI block after WAVEDATA,

So the remaining problem was not UI responsiveness anymore, but the ARB download response parser being too strict for the real SDG response format.

What was changed in v0.2.1

  • Reworked the ARB handling in the affected area
  • ARB download parser now accepts both:
    • SCPI block format after WAVEDATA,
    • raw payload directly after WAVEDATA,
  • Improved parsing of STL? BUILDIN and STL? USER
  • Built-in ARB selection now uses index-based handling
  • User ARB selection continues to use name-based handling

Hardware test result

Retested on the real SDG2042X.

Result:

  • ARB download works
  • ARB upload works
  • No freeze observed during the tested transfer path
  • Original functional failure from Issue #15 could not be reproduced anymore

Conclusion

Issue #15 is considered fixed and hardware-verified in v0.2.1.

Suggested closure note

Closing this issue as fixed in v0.2.1 after successful real-hardware test of both ARB download and ARB upload.

## Issue #15 update Tested on real SDG2042X after the ARB rework in **v0.2.1**. ### Original problem In v0.2 the GUI freeze during ARB download was already fixed, but the actual download still failed on the real instrument with: `[ERR] ARB download: No SCPI block after WAVEDATA,` So the remaining problem was not UI responsiveness anymore, but the ARB download response parser being too strict for the real SDG response format. ### What was changed in v0.2.1 - Reworked the ARB handling in the affected area - ARB download parser now accepts both: - SCPI block format after `WAVEDATA,` - raw payload directly after `WAVEDATA,` - Improved parsing of `STL? BUILDIN` and `STL? USER` - Built-in ARB selection now uses index-based handling - User ARB selection continues to use name-based handling ### Hardware test result Retested on the real SDG2042X. **Result:** - ARB download works - ARB upload works - No freeze observed during the tested transfer path - Original functional failure from Issue #15 could not be reproduced anymore ### Conclusion Issue #15 is considered **fixed and hardware-verified** in **v0.2.1**. ### Suggested closure note Closing this issue as fixed in v0.2.1 after successful real-hardware test of both ARB download and ARB upload.
tgohle added this to the Close all Bugs higer or equal "Medium" milestone 2026-04-20 12:37:34 +00:00
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Reference: tgohle/0003-SDG2042X-PyQt-GUI-for-Linux#15