Prohibit navigation depending on the value in the multilist contacts field. How to implement?

So far I've seen a difficult option: 1) all contacts from the contacts directory (which is a multilist) using the action add contacts to contacts of the process [file]17750[/file] get into the contacts of the process 2) Next action "Add process contacts as dummy products" [file]17751[/file] 3) Using the action copy process product fields [file]17752[/file], we copy the name of the process product (contact names from that field of the contact directory) into the additional field of the process product (choose the name of this field yourself :) for the next action to work 4) Add a process field (the same contact, only a string type) set the action "fill in the process or contact field" and set there [file]17753[/file] such settings 4) And then we stop performing actions if at least one additional field of the process product does not match the same contact field [file]17754[/file] [file]17755[/file] 5) And if the conditions are not met (at least one name of the fictitious product has the same value as the name of "that one contact"), then the system prohibits switching the stage I’m trying to remember the option where there is a “contains a field” in the action, but I didn’t find it right away if my version helped - I will be grateful for a tip :) you can leave them under the comment [file]17756[/file]

Thanks for the answer. But the solution using process contacts and fictitious products is not suitable, since both process contacts and fictitious products are already used in the process. And you also need not just to stop the execution of actions, but to issue an error, which is very important.

[quote] Mulach Marina Anatolievna SheBo wrote: Well, you can have this option: 1. copy the fields of the multi-list of contacts and the directory of contacts into the field with the string type (the contact id will be written there) [file]17759[/file] 2. With the action Change the value of the process field, depending on another field of the process, we check for a partial match of the line with the multilist and the line of the contact directory, and depending on the fulfillment of the conditions, we write in some additional field a sign to prohibit the transition or not [file]17760[/file] 3. prohibit or allow the transition depending on the value of the additional field [file]17761[/file] [file]17762[/file] testing showed that it works only if you compare strings [/quote] Thanks a lot. I will test with long contact id.