Orbmu2k/nvidiaProfileInspector · error · NvapiException

DRS_DeleteApplication

Error message

DRS_DeleteApplication

What it means

NvapiException thrown by DeleteApplication when DRS_DeleteApplicationEx returns a non-OK status. It means the driver refused to remove the executable registration from the profile. The wrapped NvAPI_Status gives the exact reason (app not found, invalid handle, etc.).

Solutions

  1. Check the wrapped NvAPI_Status; treat 'not found' statuses as already-deleted success cases.
  2. Ensure the application struct was obtained via DRS_FindApplicationByName/enum from the SAME profile handle you pass to DeleteApplication.
  3. Verify the session is still open and the profile exists before deleting.
  4. Retry after re-fetching the application struct if the driver state changed concurrently.

Example fix

// before
var caRes = nvw.Instance.DRS_DeleteApplicationEx(hSession, hProfile, ref application);
if (caRes != NvAPI_Status.NVAPI_OK)
    throw new NvapiException("DRS_DeleteApplication", caRes);
// after
var caRes = nvw.Instance.DRS_DeleteApplicationEx(hSession, hProfile, ref application);
if (caRes == NvAPI_Status.NVAPI_EXECUTABLE_NOT_FOUND)
    return; // already gone
if (caRes != NvAPI_Status.NVAPI_OK)
    throw new NvapiException("DRS_DeleteApplication", caRes);
Defensive patterns

Strategy: try-catch

Validate before calling

// ensure the app struct came from this profile
var found = FindApplication(hSession, hProfile, application.appName);
if (found == null) return; // nothing to delete

Try / catch

try { DeleteApplication(hSession, hProfile, app); }
catch (NvapiException ex) when (ex.Status == NvAPI_Status.NVAPI_EXECUTABLE_NOT_FOUND)
{ /* already removed - treat as success */ }
catch (NvapiException ex)
{ log.Error($"DRS_DeleteApplicationEx failed: {ex.Status}"); throw; }

Prevention

When it happens

Trigger: DeleteApplication calls DRS_DeleteApplicationEx(hSession, hProfile, ref application) and the driver returns anything other than NVAPI_OK — application not registered in that profile, stale application struct/handle, invalid session, or internal NVAPI error.

Common situations: Deleting an app that was already removed (concurrent modification); passing an NVDRS_APPLICATION_V4 obtained from a different profile; session destroyed before the delete; the app is a pre-defined driver entry that cannot be removed.

Understand the failure class

Background: "Not found" and "does not exist" errors: why "Task not found", "No such folder", and "Can't find" fire when a lookup comes back empty — this error's family across 14 libraries.

Related errors

AI-assisted analysis of Orbmu2k/nvidiaProfileInspector@2f50c388b3 (2026-09-15). Data as JSON: /api/errors/ebcc4b3ebbad0663. Report an issue: GitHub.

Appendix: source

Thrown at nvidiaProfileInspector/Common/DrsSettingsServiceBase.cs:337

            if (resCurrentProfile != NvAPI_Status.NVAPI_OK)
                throw new ApplicationException($"NVAPI Bug mitigation failed to add application '{pApplication.appName}' in current profile");

            var resOtherProfile = nvw.Instance.DRS_CreateApplication(hSession, otherProfile, ref appToRestore);
            if (resOtherProfile != NvAPI_Status.NVAPI_OK)
            {
                var profile = GetProfileInfo(hSession, otherProfile);
                throw new ApplicationException($"NVAPI Bug mitigation failed to restore application '{appToRestore.appName}' in profile '{profile.profileName}'");
            }

            return true;
        }


        protected void DeleteApplication(IntPtr hSession, IntPtr hProfile, NVDRS_APPLICATION_V4 application)
        {
            var caRes = nvw.Instance.DRS_DeleteApplicationEx(hSession, hProfile, ref application);
            if (caRes != NvAPI_Status.NVAPI_OK)
                throw new NvapiException("DRS_DeleteApplication", caRes);
        }

        protected List<IntPtr> EnumProfileHandles(IntPtr hSession)
        {
            var profileHandles = new List<IntPtr>();
            var hProfile = IntPtr.Zero;
            uint index = 0;

            NvAPI_Status nvRes;

            do
            {
                nvRes = nvw.Instance.DRS_EnumProfiles(hSession, index, ref hProfile);
                if (nvRes == NvAPI_Status.NVAPI_OK)
                {
                    profileHandles.Add(hProfile);
                }
                index++;

View on GitHub (pinned to 2f50c388b3)