diff -r c8bac4b0ef07 -r 78df3d65a1cc src/Pure/PIDE/command.scala
--- a/src/Pure/PIDE/command.scala	Sat Jan 07 17:32:11 2017 +0100
+++ b/src/Pure/PIDE/command.scala	Sat Jan 07 19:36:40 2017 +0100
@@ -351,8 +351,8 @@
       // inlined errors
       case Thy_Header.THEORY =>
         val header =
-          resources.check_thy_reader("", node_name,
-            new CharSequenceReader(Token.implode(span.content)), Token.Pos.command)
+          resources.check_thy_reader(
+            "", node_name, new CharSequenceReader(Token.implode(span.content)))
         val errors =
           for ((imp, pos) <- header.imports if !can_import(imp)) yield {
             val msg =