Fatal Internal Error - 0x90FFFA4E: "AppEntryPoint.cpp"

Issue Details

Solution

Follow the troubleshooting steps relevant for the operating system you are using:

Windows OS

• If you are running LabVIEW as a different user, this error may be caused by the Windows Feature Update via Windows 10, version 1909 Enablement Package. Uninstall this update and see if the issue still occurs. 
• Try force reinstalling LabVIEW. 

MAC OS

Try uninstalling LabVIEW using the Terminal window.  
 

Linux OS

In a Linux environment, this error may occur due to updates in software dependencies. NI driver software versions 18.0 and higher cannot be installed through your Linux distribution's package manager if there is a pre-18.0 NI driver on the system. Pre-18.0 NI drivers must be uninstalled first. After uninstalling you need to download and install the newer versions of the Linux drivers. 

Real-Time Target (Linux Real-Time OS)

1. Reboot your device.

2. Reset he MAX database by following the steps in this article: How to Fix or Reset the NI MAX Database File.

Additional Information

If the uninstalling process does not solve this problem, as a temporary workaround, try installing and running LabVIEW in a virtual machine. As another workaround, try creating a temporary new user and reinstalling LabVIEW.

In case for Fatal Internal Error - 0x90FFFA4E: "AppEntryPoint.cpp" at line 105 occurred in LabVIEW 2025 Q3, a bug case has been raised when the LabVIEW crash when Default Data Directory is map to restricted network drive. Refer to Bug 3595176 to NI Technical Support for more information. Possible workaround is deleting the INI file or otherwise don't use invalid directories.