INPUT PROGRAM: Avoid infinite loop for trivially empty input program.

[pspp] / doc / data-io.texi

diff --git a/doc/data-io.texi b/doc/data-io.texi
index 313e543205a41f430ac864534ce22a132bfabecd..1316f603a6aa9d8c0ee832d460817ba645531570 100644 (file)
--- a/doc/data-io.texi
+++ b/doc/data-io.texi
@@ -795,6 +795,9 @@ so an infinite loop results.  @cmd{END FILE}, when executed,
 stops the flow of input data and passes out of the @cmd{INPUT PROGRAM}
 structure.
 
+@cmd{INPUT PROGRAM} must contain at least one @cmd{DATA LIST} or
+@cmd{END FILE} command.
+
 All this is very confusing.  A few examples should help to clarify.
 
 @c If you change this example, change the regression test1 in