How to use variables in string concatenation

Hi folks!

 

Is there any way to use variables in a string concatenation? What I'm exactly trying to do is to make use of a variable as part of an IP address, e.g.:

 

10.10.@DataNet.122

 

Which  should lead to an output similar to: 10.10.10.122, if 10 was the specified value.

 

Output fails with the following message:

Error:Variable @DataNet.80.5 could not be matched. Possible causes of this are:
1) It has not been declared.
2) You are referencing an entity property which does not exist.
3) You are missing a closing bracket in a prior native block.

I think this problem is located in the way entities are used. Is there any possibility to escape the period after the used variable or something?

 

Thanks in advance!