>I'm still following the Jump Start steps but making some changes for my own project. I was able to build the solution and run the application but when I call my form, I get the error "Invalid characters in path." I'm not sure where to look next. The details are listed below. Thanks.

> at System.IO.Path.CheckInvalidPathChars(String path)
> at System.IO.Path.GetExtension(String path)
> at OakLeaf.MM.Main.mmString.JustExt(String fileName)
> at OakLeaf.MM.Main.mmBindingStrategyCommon.GetBindingSourceMember(String member)
> at OakLeaf.MM.Main.mmBindingStrategyCommon.GetBindingSource(mmBusinessObject bizObj, String member, String& dataTableName, String& dataViewName, String& memberName)
> at OakLeaf.MM.Main.Windows.Forms.mmBindingStrategyBase.GetBindingSource(mmBusinessObject bizObj, String member, String& dataTableName, String& dataViewName, String& memberName)
> at OakLeaf.MM.Main.Windows.Forms.mmBindingStrategyList.BindData(ImmBindingList mmControl, mmBusinessObject bizObj, mmBusinessStateChangeEventArgs e)
> at OakLeaf.MM.Main.Windows.Forms.mmBindingStrategyList.BindData(ImmBindingList mmControl, mmBaseBusinessObject bizObj, mmBusinessStateChangeEventArgs e)
> at OakLeaf.MM.Main.Windows.Forms.mmComboBox.OnBindData(mmBaseBusinessObject bindingSource, mmBusinessStateChangeEventArgs e)
> at OakLeaf.MM.Main.Windows.Forms.mmUIHelper.StateChangeHandlerList(Control control, mmBaseBusinessObject bizObj, mmBusinessStateChangeEventArgs e)
> at OakLeaf.MM.Main.Windows.Forms.mmComboBox.StateChangeHandler(mmBaseBusinessObject bizObj, mmBusinessStateChangeEventArgs e)

Based on your stack trace it looks like there are invalid characters in the binding properties of one of the combo boxes on your form. If you examine the binding properties of all your combo's but don't see any problems, you can determine which one is causing the error by setting the BindingFlag property to false on one combo box at a time. When the problem goes away, you've found your culprit!

Regards,