diff --git a/cg/cgsaldac.cpp b/cg/cgsaldac.cpp
index d702f1555..983b7c3a6 100755
--- a/cg/cgsaldac.cpp
+++ b/cg/cgsaldac.cpp
@@ -1713,8 +1713,12 @@ void TPartita::update_reg(long nreg, const TRectype& mov, TPartite_array& pa)
       }
       else
       {
-        const int numrig = rig.get_int(PART_NUMRIG);
-        CHECK(numrig > 0, "Bad NUMRIG");
+        int numrig = rig.get_int(PART_NUMRIG);
+        if (numrig <= 0)
+        {
+          NFCHECK("Bad NUMRIG: %d", numrig);
+          rig.put(PART_NUMRIG, numrig = 1);
+        }
                      
         const TImporto imptotdoc = pa.importo_speso(nreg, numrig, false, 0x9);
         rig.put(PART_IMPTOTDOC, imptotdoc.valore());