> For the complete documentation index, see [llms.txt](https://help.bizanalyst.in/biz-analyst-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.bizanalyst.in/biz-analyst-manual/support/problems-with-tally-after-installing-biz-analyst/group-company-mav-error.md).

# Tally crashes when I open Group Company

![](/files/-LUxRcycFtiA6E12N7zT)

**Step 1:** This error may occur when you're syncing **Main group company** in Tally as given in the image:

![](/files/-LUxOAIFkVHqPchOzJ9T)

**Step 2:** So to avoid this error you need to select "**Sub- Group Company**" instead of **Main Group Company** in Tally i.e **Group 1** or **Group 2.**

![](/files/-LUxPkSRMk_5JWKjI4ky)

**Step 3:** After this **Biz Analyst Sync** will work fine and you will not get **MAV** error.