diff --git a/src/factories/MtxFactory.cpp b/src/factories/MtxFactory.cpp
index d8f720d..eb7d833 100644
--- a/src/factories/MtxFactory.cpp
+++ b/src/factories/MtxFactory.cpp
@@ -126,7 +126,7 @@ ExportResult MtxBinaryExporter::Export(std::ostream &write, std::shared_ptr<IPar
         writer.Write(m.mtx[14]);
         writer.Write(m.mtx[15]);
     }
-    throw std::runtime_error("Mtx not tested for otr/o2r.");
+    //throw std::runtime_error("Mtx not tested for otr/o2r.");
     writer.Finish(write);
     return std::nullopt;
 }