diff --git a/API_MachMgr.cpp b/API_MachMgr.cpp
index 821f51c..8c56790 100644
--- a/API_MachMgr.cpp
+++ b/API_MachMgr.cpp
@@ -1055,9 +1055,9 @@ __stdcall EgtSetMachiningGeometry( int nNumId, const int nIds[], const int nSubs
       return FALSE ;
   // creo elenco identificativi
    SELVECTOR vIds ;
+   vIds.reserve( nNumId) ;
    for ( int i = 0 ; i < nNumId ; ++ i)
       vIds.emplace_back( nIds[i], nSubs[i]) ;
-   vIds.reserve( nNumId) ;
    return ( ExeSetMachiningGeometry( vIds) ? TRUE : FALSE) ;
 }