Handle the first error before proceeding

actions/actiongenintfile.h

@@ -178,8 +178,8 @@ MString ActionGenIntFile_DoAction(const CLArgs& args, D& ds)
   if(is2D)
   {
    auto retu = ad.Read2D(uvar, ind[it]);
-   auto retv = ad.Read2D(vvar, ind[it]);
    if(!retu) return "Can't read U data";
+   auto retv = ad.Read2D(vvar, ind[it]);
    if(!retv) return "Can't read V data";
    udata2 = retu.Value();
    vdata2 = retv.Value();
@@ -187,8 +187,8 @@ MString ActionGenIntFile_DoAction(const CLArgs& args, D& ds)
   else
   {
    auto retu = ad.Read3D(uvar, ind[it]);
-   auto retv = ad.Read3D(vvar, ind[it]);
    if(!retu) return "Can't read U data";
+   auto retv = ad.Read3D(vvar, ind[it]);
    if(!retv) return "Can't read V data";
    udata3 = retu.Value();
    vdata3 = retv.Value();