Hello,

in some addon airports, for example Jetstream's LIML, after landing i ask for a parking clearance, and the ATC says "taxi to park "-MISSING NUMBER-" via taxiway...ect.

It's missing the parking area number. With gates it works, and in default LIML it works.
What could be the problem? 

From what I can recall p3d atc does not speak the parking number, only gate number.

Hi him, 

That could be a good explanation, if we talk about addon apts. In default apts it speaks the park number. Quite sensless. 

I don't recall ever being directed to a specific parking number by the default ATC. It's always "taxi to GA parking via taxiway etc etc." It's actually mildly annoying because if you're doing a park/service/depart again run, you have to turn on progressive taxi so that you know where the sim wants you to go so that you can get taxi for takeoff options in the dialog box.

 

if you choose a DEFAULT airport and you ask for parking (not gate), the ATC works fine and tells you the parking number.

Try yourself please to see if it is the same to you as well. 

Looks like it happens only with addons airports.

I just checked at default LIML and atc didn't say the parking number, perhaps a screenshot of your atc message you are getting will clarify.