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Qblade not responding
Quote from Caston R on 11. June 2025, 16:40Hi, I’m new to QBlade, and I’ve downloaded and unzipped everything. When running the XFOIL analysis, QBlade becomes unresponsive. Is there a way I can troubleshoot this?
Hi, I’m new to QBlade, and I’ve downloaded and unzipped everything. When running the XFOIL analysis, QBlade becomes unresponsive. Is there a way I can troubleshoot this?

Quote from David on 11. June 2025, 16:55Hi Caston,
when you say “unresponsive,” do you mean that QBlade is crashing? In some cases, generating the polars and loading the operational point data can take a while. Did you wait long enough to see if the process would complete?
Also, could the error be similar to this: https://qblade.org/qblade-forum/topic/polar-creation-not-happening/
BR,
David
Hi Caston,
when you say “unresponsive,” do you mean that QBlade is crashing? In some cases, generating the polars and loading the operational point data can take a while. Did you wait long enough to see if the process would complete?
Also, could the error be similar to this: https://qblade.org/qblade-forum/topic/polar-creation-not-happening/
BR,
David
Quote from Caston R on 11. June 2025, 17:41Hi, David
I would assume that QBlade is crashing because if I click anywhere on the QBlade screen, then it starts going “unresponsive”. I will see if I’m just being impatient with generating the polars.
BR,
Caston
Hi, David
I would assume that QBlade is crashing because if I click anywhere on the QBlade screen, then it starts going “unresponsive”. I will see if I’m just being impatient with generating the polars.
BR,
Caston
Quote from Caston R on 11. June 2025, 18:26This is how my screen looks after running the analysis if this helps with figuring out how to troubleshoot.
This is how my screen looks after running the analysis if this helps with figuring out how to troubleshoot.
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Quote from David on 12. June 2025, 13:45Hi,
when you run the analysis, do you see the XFoil progress bar at all? If not, the issue is likely related to the execution of the XFoil binary itself. If the progress bar does appear, the problem may instead lie in loading the files generated by XFoil.
In either case, I recommend trying to grant full administrative rights to both the QBlade executable and the XFoil binary (located in the /Binaries folder). Both binaries must have permission to read and write files on your system for this process to function correctly.
BR,
David
Hi,
when you run the analysis, do you see the XFoil progress bar at all? If not, the issue is likely related to the execution of the XFoil binary itself. If the progress bar does appear, the problem may instead lie in loading the files generated by XFoil.
In either case, I recommend trying to grant full administrative rights to both the QBlade executable and the XFoil binary (located in the /Binaries folder). Both binaries must have permission to read and write files on your system for this process to function correctly.
BR,
David
