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Hi, I have run the NS4 with no error in original example "p4simulator-large-scale". However, after I added a new table and action, I cannot install the new table sqy_table successfully. So, I inserted "NS_LOG_ERROR" to your source code in the file "p4-switch-interface.cc" as below:

if (m_p4Model->mt_add_entry(0, parms[1], matchKey, parms[2], actionData, &handle, priority) != bm::MatchErrorCode::SUCCESS)
     {
             NS_LOG_ERROR("Parse ActionData ERROR");
             throw P4Exception(NO_SUCCESS);
      }

And I found the function "mt_add_entry" cannot be executed successfully. Some information in my /tmp/p4.log are shown below:

TABLE_SET_DEFAULT:table_set_default sqy_table _drop
TABLE_ADD:table_add sqy_table set_port 0x00000000 => 0x1
Parse ActionData from index:5
Parse ActionData ERROR
Calling target program-options parser
NO_SUCCESS
exception entry: table_add sqy_table set_port 0x00000000 => 0x1
TABLE_ADD:table_add sqy_table set_port 0x00000001 => 0x0
Parse ActionData from index:5
Parse ActionData ERROR
NO_SUCCESS

I do not know how to solve this problem.
Looking forward to your reply, sincerely.

All of the links in the readme point to https://github.com/ns-4/P4Simulator-DEV/wiki/[topic], which Github claims doesn't exist. Most likely, that's a private repository. You should replicate those pages in this repository's wiki and correct the links.