//@moduleElements.0/@body/@statements.0/@startTagPrefix/@aql/@arguments.0
Add parameter notExisting
Replace file:/home/development/git/acceleo/tests/org.eclipse.acceleo.aql.tests/resources/language/protectedArea/withStartTagPrefixInvalidExpression/withStartTagPrefixInvalidExpression.mtl [143, 2, 53, 143, 2, 53] , notExisting: String
Surround with Let: notExisting
Replace file:/home/development/git/acceleo/tests/org.eclipse.acceleo.aql.tests/resources/language/protectedArea/withStartTagPrefixInvalidExpression/withStartTagPrefixInvalidExpression.mtl [149, 3, 2, 247, 5, 14] [let notExisting : String = '']
    [protected (myParam.name) startTagPrefix(notExisting.name)]
      some static text.
    [/protected]
  [/let]