Index: tol/btol/vmatrix_type/vmatgra.cpp
===================================================================
--- tol/btol/vmatrix_type/vmatgra.cpp	(revision b77a57ad53d8ab2f0fe00802d272e3b88280a14a)
+++ tol/btol/vmatrix_type/vmatgra.cpp	(revision c2dbd4c650d4ab3a68f531a30db3ed631e28c04a)
@@ -1018,5 +1018,5 @@
 //--------------------------------------------------------------------
 DeclareContensClass(BVMat, BVMatTemporary, BVMatSubDiag);
-DefExtOpr(1, BVMatSubDiag, "SubDiag", 1, 1,
+DefExtOpr(1, BVMatSubDiag, "SubDiag", 1, 2,
   "VMatrix Real ",
   "(VMatrix m [, Real diagNumber=0])",