msg.present = OpenPDU_PR_simple;
asn_long2INTEGER(&msg.choice.simple.version, SimpleOpen__version_version_1);
-std::string pen(PEN_PREFIX);
-pen += ".1";
-if (!String2OI(pen.c_str(), &msg.choice.simple.identity))
+if (!String2OI(PEN_PREFIX, &msg.choice.simple.identity))
{
printfd(__FILE__,
"SendOpenPDU() - failed to convert string to OBJECT_IDENTIFIER\n");