hi othos,

yesterdayI've seenthe link (https://pdn.pega.com/support-articles/failure-opening-rule-instance-err…),

butIfound theproblemwhile opening SMA ( I attachthe problem )

thanks

hi ranjr,

I thinkit'sone of the problems , andhas beenposted on the forumbymy colleague.(https://pdn.pega.com/community/product-support/question/pega-cannot-run…)

but in this case, I useanotherserver ( 2 server but 1 schema DB ), according tomy logic,there should be noproblem.butafter Iopen one class or property error occurs as described in attachment.

can u help me :)

thanks

I suggest you double-check the class really exist by looking straight in the database.

Also you can try to open it via activity OpenByHandleDD. I forgot the exact synthax of the parameter you need to use so test first with a class you have access.

Classes are saved in table pr4_base. Check via some SQL query that the class really exists.

You may see the class in app explorer as PRPC may save the class information in some other tables for performance for example. This can happen if someone deleted the class straight from the database and not via PRPC developer portal. A symptom of this is for instance seeing the class via a search (as it still indexed) but not able to open it which similar error as the one you have shown.

If the class does exist then this suggest a permission issue.

If the class doesn't exist Then you could attempt to just create a new one with the same name.

If this is going to deep, I recommend you raise a service request.