# Why do I receive the following error when launching my webform in WorkflowGen: "Invalid access to memory location"?

**URL:** <https://discuss.workflowgen.com/t/why-do-i-receive-the-following-error-when-launching-my-webform-in-workflowgen-invalid-access-to-memory-location/207>\
**Category:** Visual Studio Web Forms\
**Created:** [July 5, 2011, 2:01am UTC](https://discuss.workflowgen.com/t/why-do-i-receive-the-following-error-when-launching-my-webform-in-workflowgen-invalid-access-to-memory-location/207 "2011-07-05T02:01:00Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![wfg-admin](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.workflowgen.com/wfg-admin/32/714_2.png) [@wfg-admin](https://discuss.workflowgen.com/u/wfg-admin)\
**Post date:** [July 5, 2011, 2:01am UTC](https://discuss.workflowgen.com/t/why-do-i-receive-the-following-error-when-launching-my-webform-in-workflowgen-invalid-access-to-memory-location/207/1 "2011-07-05T02:01:00Z")

</div>

### Issue

I receive an `Invalid access to memory` error when launching my web form in WorkflowGen.

### Possible cause

You may have an outdated WorkflowGen.My.dll reference in your web form project. Update the DLL file with a more recent version (see the [Release Notes & Downloads](https://discuss.workflowgen.com/c/announcements/release-notes/6) section).