https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46500#M2472 I am getting this error when trying to open a shared application modeller - no other objects are open. When I click Ok the app modeller opens and is connected to the target system, highlighting and identifying works fine but check exists keeps failing.   I have looked on the forum and Knowledge Base but have been unable to find any details as to what this error is or how to resolve it. Thu, 29 Mar 2018 16:08:00 GMT jgregor4 2018-03-29T16:08:00Z https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46500#M2472 I am getting this error when trying to open a shared application modeller - no other objects are open. When I click Ok the app modeller opens and is connected to the target system, highlighting and identifying works fine but check exists keeps failing.   I have looked on the forum and Knowledge Base but have been unable to find any details as to what this error is or how to resolve it. Thu, 29 Mar 2018 16:08:00 GMT https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46500#M2472 jgregor4 2018-03-29T16:08:00Z https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46501#M2473 Why are you using a Shared Application Model???  That feature only exists for a very limited number of use cases - like a specific mainframe application where you can only be connected with one object.  For all other applications where it is possible to attach multiple times you should have an application model for each object. Thu, 29 Mar 2018 21:53:00 GMT https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46501#M2473 PSSupport 2018-03-29T21:53:00Z https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46502#M2474 It is a mainframe application. Also the BP documentation recommends shared app modellers Thu, 29 Mar 2018 22:00:00 GMT https://community.blueprism.com/t5/Product-Forum/Error-locking-parent-model-Empty-process-ID-supplied-to/m-p/46502#M2474 jgregor4 2018-03-29T22:00:00Z