Error when installing program: "Unspecified error / 0xfffff95a" or "Fatal error during installation / 0x80070643"

Product(s): WaterGEMS, WaterCAD, SewerGEMS, SewerCAD, CivilStorm, StormCAD, HAMMER, PondPack, FlowMaster
Version(s): 10.00.00.XX, 10.01.XX.XX
Area: Installation


When installing version of the Water products or , one of the following error messages is generated:

"Unspecified error / 0xfffff95a"

"0x80070643 - Fatal error during installation"

Or while installing version of the storm/sewer products, the following error message is generated:

"0x80070642 - Fatal error during installation"

Solution - Install/Repair .NET Framework 4.6.2

For CONNECT Edition Update 1 (10.01.XX.XX) of the storm and sewer products, in some cases this issue was resolved after installing or repairing Microsoft .NET Framework 4.62.

See: Related forum thread | .NET Framework cleanup tool 

Solution - Reboot

This issue is often due to a pending reboot condition. In other words, the Operating System is waiting for the user to reboot, which prevents installation of our software. First, try rebooting the computer and then install the water or storm/sewer product once more. Future versions will provide a more clear message in this case.

Solution - CONNECTION Client

If the issue still continues, it may be related to the installation of CONNECTION Client. There is a CONNECTION Client installer included with the installation file for the water or storm/sewer products. If the installation of CONNECTION Client fails, the error message above will be generated.

To resolve this issue, try installing CONNECTION Client first. You can download this from the Software Downloads section of the CONNECTION Center. Search for CONNECTION Client version, and download and install this on the computer. Once this is completed, you can try installing the water or storm/sewer product again.

Solution - out of disk space

The "0x80070643" error can also occur if you have run out of disk space. Check the available space on the drive that you selected to install to. If disk space is too low, delete unnecessary files or install to a different drive with adequate free space.

Solution - Scripting issue, requiring updated installation file

If a reboot or reinstallation of the CONNECTION Client does not resolve the issue, you may have encountered a more rare situation where the setup cannot execute certain scripts. This can happen due to security software on your computer such as Antivirus, AntiMalware, security suite, or potentially even built-in Windows security functions. Starting with CONNECT Edition Update 3 (10.03.XX.XX), the installation files have been amended to skip over cases where such issues prevent the installation from completing. Click here for information on upgrading, once this version is available. While this can enable you to install the software, you will not be able to integrate with AutoCAD/MicroStation/ArcMap.

If you need to use an older version - after the error appears, open File Explorer (Windows Explorer), type "%temp%" in the address bar, press enter (to navigate to the Windows Temp folder), sort by modified date, then look at the most recently updated files. You should see a file with the OpenFlows product name in the file name, ending with .msi.log. Open this file and search for the term "FindMicroStationParentPath". If you find an instance of this that indicates a failure, please contact Technical Support for assistance. Note that future versions will no longer have this issue.

See Also

Download OpenFlows | Hydraulics and Hydrology software

Error installing Hydraulics and Hydrology products on Windows 7: x800713ec Failed to read registry value