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Windows32Exception - The parameter is incorrect

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#1,700 11 comments 0 reactions 0 assignees View on GitHub

@marktech0813 is already working on this.

Since Nov 11, 2025.

  • #1701 by @marktech0813 — open

Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
java

Research direction

Start in WindowUtils.java around W32WindowUtils.getProcessFilePath at line 1302 and the callback near line 1252, then trace the WindowsUtils.getAllWindows(false) path. Reproduce the exception for the affected windows and inspect how the Win32Exception is surfaced. Done should include a defined handling for this failure that prevents repeated irrelevant log noise, with any relevant existing tests updated or added.

Written by the indexing model from the issue text.

Description

Hello

I am calling WindowsUtils.getAllWindows(false) from a service every 10 seconds and is throwing a Win32Exception, for some specific windows, I assume.

com.sun.jna.platform.win32.Win32Exception: The parameter is incorrect.
	at com.sun.jna.platform.WindowUtils$W32WindowUtils.getProcessFilePath(WindowUtils.java:1302)
	at com.sun.jna.platform.WindowUtils$W32WindowUtils$5.callback(WindowUtils.java:1252)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.invokeCallback(CallbackReference.java:585)
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.callback(CallbackReference.java:613)
	at com.sun.jna.Native.invokeInt(Native Method)
	at com.sun.jna.Function.invoke(Function.java:429)

I am not sure how to even begin debugging this error or what to do about it. It keeps filling my logs and I cannot see relevant logs anymore

Dominant language
Java
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