# D2L Known Issue - Graphical Equation Editor license error (with workarounds)

This article lists and demonstrates workarounds to the reduced functionality of the Graphical Equation Editor in D2L.

## About the known issue

As of March 6th, the license for the D2L Graphical Equation Editor has expired. This has led to reduced functionality.

- Students and instructors can create new equations using the graphical editor but...
- Existing equations created with the Graphical Equation Editor cannot be re-edited, and
- all equation previews from the HTML editor do not work.
- Below the editor, a red warning appears which states, "
**This product has an invalid license!**"

## Workarounds

We can offer the current workarounds:### Graphical Equation Editor

Edit an equation that was created with the Graphical Equation Editor.- In D2L, open the document that has the equation.
- Select
**Edit HTML**at the bottom of the screen.

- In the next window, select the
**</>**button for**HTML source editing**.

- Edit the code directly and select
**Save**.

### MathML

Create a new equation with preview.- In D2l, navigate to the document that an equation needs to be created for.
- Select
**Edit HTML**. - Navigate to the
**sigma ("Σ")**icon and click the**down arrow**. Select**<Σ> MathML equation**.

- Make sure the MathML code in the pop-up window displays exactly like the screenshot below.

- Insert your MathML code and select
**Generate a preview**to display your equation. If the equation is correct, select**Insert**.

### LaTeX

Create a new equation with preview.- In D2l, navigate to the document that an equation needs to be created for.
- Select
**Edit HTML**. - Navigate to the
**sigma ("Σ")**icon and click the down arrow. Select**<Σ>****LaTeX equation**. - In the pop-up, select
**Which LaTeX commands are supported?**to format LaTeX equations properly.

- Once the equation has been formatted properly, LaTeX automatically generates a preview. If the equation is correct, select
**Insert**.

### Edit a MathML or LaTeX Equation

- Highlight the
**sigma ("Σ")**placeholder in the HTML editor text box and click the**sigma ("Σ")**icon in the HTML editor bar.

- The equation editor icon will highlight the editor used to create the equation.
- Select the highlighted editor and modify the equation.
- Select
**Insert**when the edit is complete.