Hi Nordic, I am adding pstorage capability to ble_app_proximity example. Before adding pstorage, the example could receive Immediate Alert from a central and set on/off to a led. As referring to ble_app_template_with_pstorage_operations, I added pstorage functions to the example. The result was that pstorage_register() retuned NRF_ERROR_INVALID_PARAM. So I modified PSTORAGE_MAX_APPLICATIONS definition in pstorage_platform.h from 1 to 2. pstorage_register() returns no error, but Immediate Alert event cannot be received. Why does the modification of PSTORAGE_MAX_APPLICATIONS have a influence to Immediate Alert Service? It looks like that ble event does't occurs periodically after the modification. Please let me know the workaround. Thanks.