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-rw-r--r--src/base/abci/abcUnreach.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base/abci/abcUnreach.c b/src/base/abci/abcUnreach.c
index cced1c47..e4873986 100644
--- a/src/base/abci/abcUnreach.c
+++ b/src/base/abci/abcUnreach.c
@@ -95,7 +95,7 @@ int Abc_NtkExtractSequentialDcs( Abc_Ntk_t * pNtk, bool fVerbose )
pNtk->pManGlob = NULL;
// make sure that everything is okay
- if ( !Abc_NtkCheck( pNtk->pExdc ) )
+ if ( pNtk->pExdc && !Abc_NtkCheck( pNtk->pExdc ) )
{
printf( "Abc_NtkExtractSequentialDcs: The network check has failed.\n" );
Abc_NtkDelete( pNtk->pExdc );