Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

Nullable object must have a value.

at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at UserControls_NavBar.IsCurrentPageChildOfNode(Int32 RootNodeId, Int32 PageNodeId, Int32 CurrentNodeId) at UserControls_NavBar.RenderMenuListItem(Object RowUrl, Object RowId)

DynaVox Support Center

Support

24/7 Technical Support

Knowledge Base

DynaVox Technical Support has compiled hundreds of step-by-step instructions and troubleshooting tips in our Knowledge Base. Search by products, keywords or phrases.

Search

Most Popular Answers

You can also click to view one of our most popular answers.

  1. DynaVox/DynaMyte 3100: Online Training
  2. DV4/MT4: Digital Image training mini-module
  3. DV4/MT4: Backup/Restore training mini-module
  4. Boardmaker: General Problems and Fixes
  5. DV4/MT4: 1.06.20 - Open Issues with 1.06.20

See All Popular Answers

Video Library

Video Library

Short, how-to videos on many of our most popular products – available with the click of a mouse. Start watching »

Dialog

Ask questions, share ideas, offer support or simply talk to others in the AAC community. Jump in »

Register

Register Your Device

Registering your new DynaVox product is quick and easy and entitles you to a wide range of benefits such as notifications of product updates and special offers. Register Today »

Save

SAVE NOW!

We are offering AlphaCore for only $99 versus the standard price of $350, when AlphaCore is purchased along with a new V, Vmax or EyeMax. Learn more (PDF)

View all Promotions »



AAC Devices

Educational Products

Accelerated Learning

DynaVox Support

Community Resources