LASExt.DLL Failed to register


While installing LP360 for ArcGIS receive the error, “Module C:\Program Files (x86)\Common Files\QCoherent\LASExt.dll failed to register. HRESULT -1073741819”. Multiple errors of a similar nature for other DLLs also occur if one continues with the installation.

LASExt Failed to Register HRESULT -1073741819

Probable Resolution:

If on a Windows 7 or Server 2008 R2 operating system with Windows Update KB4041686 or similar installed:

  1. Continue through the errors to complete the installation.
  2. Open an elevated command prompt by right-clicking on Command Prompt and selecting “Run as Administrator”
  3. Change directory using “cd “c:\Program Files (x86)\Common Files\QCoherent” “
  4. Execute regall.bat to register the DLLs that erred when using the MSI by typing “regall” at the command prompt.

Probable Resolution #2:

Roll back the Windows updates. Install LP360. Then install the Windows updates.

Probable Resolution #3:

There may be something else going on with your machine configuration that is interfering with the proper installation of LP360. From an elevated Command Prompt (right-click on Command Prompt and select “Run as Administrator”), please run the following command using the full path to where you have the 32-bit MSI and writing the log file to a directory that you can access.

msiexec /i “LP360forArcGIS_v2017.1.54.7.msi” /L*v “log32.txt”

Send the log file that gets generated to


GeoCue Group Support

GeoCue Group Support has written 597 articles

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