Can't debug this service.

Hi guys, I'm new here and fairly new to .NET (but not programming fortunately)

I've got a programe set up to recieve requests via Json and trigger the MYOB ODBC, which worked until my most recent changes. Now the system responds to any INSERT command with "20016 Unable to determine if import has finished". This normally means trouble communicating with the ODBC but all the SELECT style reads work fine so i'm pretty stumped.

Does anyone have some advice on what it *could* be, or how i can go about narrowing it down? I'm just at a loss

I don't know if this helps narrow it down or not, but this is the 'type' of the error;

Equivalent to HTTP status 500. System.Net.HttpStatusCode.InternalServerError
indicates that a generic error has occurred on the server.

With the following StackTrace:

at MYOBService.PurchasesResource.Post(Purchase purchase) in C:\websites\MYOB Service\source\Resources\PurchasesResource.cs:line 66
at SyncInvokePost(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.I nvoke(Object instance, Object[] inputs, Object[]& outputs)
at System.ServiceModel.Dispatcher.DispatchOperationRu ntime.InvokeBegin(MessageRpc& rpc)

You will need to do custom drawing to handle this. Look up OwnerDraw. The typical (and simpler) pattern is just to not include those items in the ListBox.An alternative would be to use ListView in Details view mode. Then you can modify each item's fore/back colors, font, and more.
dapfor.com/en/net-suite/net-grid/tutorial/threadsafe-bindinglist