Latest update and Sandboxie

I updated the free version of Avast Virus protection today. When I use it in conjunction with Sandboxie I get the following message.

"The instruction at “0x78576b1d” referenced memory at “0x00000002”. The memory could not be “read”

Click on OK to terminate the programme."

I have used Sandboxie in conjunction with Sandboxie for at least a couple of years without problem.

The message does not occur when using Firefox, Internet Explorer or Google Chrome without Sandboxie.

I would be grateful for any comments or help.

I like the additional protection that Sandboxie gives.