Exception when serializing EMV2 annex

[philip-alldredge]

Summary
Under specific circumstances an exception is thrown when serializing a model containing an error model library with the text editor closed

Expected behavior
Exception should not be thrown. Error type should be created.

Actual behavior
Exception is thrown and error type or other created model element does not appear.

Steps To Reproduce
The problem seems to only occur when "use types ErrorLibrary;" is in the model.

1. Create an AADL diagram using the package below.
2. Close all text editor windows.
3. Use the palette to create an error type.
4. Check development environment console. Exception has been thrown. Model change is not made.

package problem
public
	annex EMV2 {**
		error types
			use types ErrorLibrary;
			A: type set {ServiceOmission};
		end types;

	**};
end problem;

Desktop (please complete the following information):

• OSATE Version: 2.9.1 and nightly
• Operating System: Windows

exception.txt

[philip-alldredge]

@smithdtyler this is the issue we found earlier when creating error type extension. It appears to occur whenever the use types ErrorLibrary; statement is in the model.