Hi when I import a file with code: I get the error
"ambiguous value of type, more than one possible value matches input"
and I don't understand the error.

This is about the "connection-type" property. An empty string is not a valid value for it. If you don't want to specify it, don't have the property at all.

I agree the error message is misleading, though I can see what's going on under the hood... When you specify an invalid/incomplete value, RouterOS tries to complete it to one of the full values. For example, writing "f" is completed to "ftp". But having an empty string can be completed to multiple values (in this case, to all values), and so you get this error.

Thanks a lot. That helped.
I just removed the variable and no more assignment problem.

I have a bigger puzzle for you if you are up for it.
Just posted a setting that does not work and I can't for my life understand what is wrong.
except perhaps that it is a little strange that I can use the master port as connection. In the wiki it is said that I it becomes inoperative when designated "master".
to use the port works just fine, I tried to put master on an unoccupied port, but that just resulted in that I could not connect to the internet.
well if you want the code look here
/Johannes