Hi Anwar,
I've had this issue this week, after updating to RU6. I have some values that I need to change and immediatly save on the OnLoad event and I was having the same javascript error.
After some debuging there was a error when the CRM javascript disables all the form controls right before the saving. When it tries to get the Sub-Grids controls they return null and the Xrm.Page.data.entity.save() method throws an exception.
After contacting support this appears to be a bug, the workarround is to add the Sub-Grids to a new tab (or use the current, that's up to you) and in the tab properties uncheck the "Expand this tab by default" so the tab shows up as Collapsed by default.
This should solve the error.
If you really need to keep the tab expanded (like I did), I imagine you're doing something like:
if(something)
{
(..).setValue(val);
(..).save();
}
just add
else
{
Xrm.Page.ui.tabs.get(“<tab name>”).setDisplayState(“expanded”);
}
to keep the tab appear as always expanded.
Let me know if this helped.
Regards, João
