# Deltacast FAQ and Troubleshooting

## **LightAct Version Notes**

* LightAct 4.11.4 → VideoMaster SDK 6.20
* LightAct 4.12.2 → VideoMaster SDK 6.31 (driver bug)
* LightAct 4.12.3 (and all later versions) → reverted to VideoMaster SDK 6.30 for stability

## **FAQ**

<details>

<summary>Should I install Flex modules one by one?</summary>

That's not necessary. Only rule is to add/remove modules when the system is powered off. Do not hot-plug modules while running.

</details>

<details>

<summary>Why did I get a BSOD during Install.bat?</summary>

Possible causes: mixed VideoMaster versions, loose module connections, or system hot-plugging. Try a clean install with recommended VideoMaster and ensure modules are installed only when powered off.

</details>


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