# 1.178 FAQ-856 Why Origin fails to insert equation to graph?

Last Update: 3/1/2018

Origin's Insert Equation tool requires Equation Editor to be installed, which was included in previous versions of Microsoft Word. If you encounter the following error when you try to open Insert Equation tool in Origin:

Failed to create Equation Editor. Make sure it is installed.

check as follow.

If you installed the January 2018 Public Update (PU)

Equation Editor (Microsoft Equation 3.0) has been removed from all versions of Microsoft Office products. To use Insert Equation tool in Origin, please consider installing the third-party App MathType.

If you haven't installed the January 2018 Public Update (PU)

If you have Microsoft Office 64bit application installed, and try to open the Insert Equation tool in Origin 32 bit application, you may also encounter this error. It is probably caused by Microsoft Office not update the Registry correctly when installed equation editor. To fix it, you need to manually update the Registry as follow.

1. Run
RegEdit.exe

in Windows command window to open Registry Editor, find the Equation.3 branch for 64bit, it should be:

HKEY_CLASSES_ROOT\CLSID\ {0002CE02-0000-0000-C000-000000000046}
2. Right click on that branch, select Export to export it, for example export it as file MyEquation64.reg.
3. Open the saved MyEquation64.reg with a Notepad. Replace all "HKEY_CLASSES_ROOT\CLSID" with "HKEY_CLASSES_ROOT\Wow6432Node\CLSID". Then save the file.
4. Double click on MyEquation64.reg to merge the content to Registry.
5. Start 32 bit Origin. Try insert Equation to graph. It should work fine now.

Keywords:Microsoft, Word, PowerPoint, 64bit