SML dissector doesn't work

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Thank you for the fast reply.

Now that works for me. But how do I act in case of an offline file without a tcp frame?

The SML dissector only dissects traffic over UDP or TCP.

You can use text2pcap to create a pcap file. By using the option -T along with suitable source and destination ports, e.g. -T 3293,7259 to match that in the sample file.

works also great. Big thanks to you, for supporting me.

Michael

But how do I act in case of an offline file without a tcp frame?

Do you mean an offline file whose contents are as shown in the Wireshark Wiki SML page, with the first four bytes being 0x1b, followed by 4 bytes of version number, followed by a sequence of messages?

yes, that's exactly what I mean.