Kendo Grid: cannot read property data of undefined

I’m posting this because I wasn’t able to find the answer by googling.  It seems it’s a fairly generic error that can mean a bunch of things, but this solved it for me.

Scenario

Kendo Grid, bound to remote datasource trying to enable CRUD.

When does it happen: Edit->Update

Error

Uncaught TypeError: Cannot read property 'data' of undefined
    at init.setup (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at init.create (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at Object.<anonymous> (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at Function.Deferred (ScriptResource.axd?d=OfhH2xFGzDSYc0LaAaaOD08yz4IMU64J5fBMHu0-Lz13cohNhivVQFfhqawUAIMaGh_RVi-P3FmRXW…:2)
    at init._promise (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at init._send (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at init.sync (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:28)
    at init.saveRow (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:50)
    at init._editUpdateClick (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl16_TSM&compress=2&_TSM_CombinedScripts_=%3b%3bT…:50)
    at HTMLAnchorElement.d (ScriptResource.axd?d=OfhH2xFGzDSYc0LaAaaOD08yz4IMU64J5fBMHu0-Lz13cohNhivVQFfhqawUAIMaGh_RVi-P3FmRXW…:2)

Resolution

Was quite simple actually, my Datasource schema didn’t define the “id” property

schema: {  
  model: {  
    id: "UserId",
    otherprop: "something"
  }
}  

Note to kendo guys

Would be nicer if the error messages were more specific, or I guess would be nicer if there were error messages not just js crashes.  This error could really be a bunch of things.