An error occurred during the operation (endpoint id 842). (ALC-WKS-007-027)

In the log file I get this:

2 errors with the message: "No scheduler found with name IDPSchedulerService";

the stack dump says this:

"tack Dump = com.adobe.idp.event.exception.EventCreateException: Event for event-type TaskCreated cannot be created in the database. Reason:com.adobe.idp.event.policy.EventPolicyException: No scheduler found with name IDPSchedulerService
at com.adobe.idp.event.manager.EventManagerImpl.createEvent(EventManagerImpl.java:499)
at com.adobe.idp.event.manager.EventManagerImpl.publishAsynchronousEvent(EventManagerImpl.ja va:636)
at com.adobe.idp.event.manager.EventManagerImpl.createEvent(EventManagerImpl.java:357)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorI"

After the 2 above erros I get:
EJB threw an unexpected (non-declared) exception during invocation of method "doRequiresNew" on bean "BeanId(LiveCycle8#adobe-dscf.jar#EjbTransactionCMTAdapter, null)". Exception data: com.adobe.idp.event.exception.EventCreateException: Event for event-type TaskCreated cannot be created in the database. Reason:com.adobe.idp.event.policy.EventPolicyException: No scheduler found with name IDPSchedulerService

and this:

0000005b ExceptionUtil E CNTR0020E: EJB threw an unexpected (non-declared) exception during invocation of method "doSupports" on bean "BeanId(LiveCycle8#adobe-dscf.jar#EjbTransactionCMTAdapter, null)". Exception data: com.adobe.idp.event.exception.EventCreateException: Event for event-type TaskCreated cannot be created in the database. Reason:com.adobe.idp.event.policy.EventPolicyException: No scheduler found with name IDPSchedulerService

finally this:

SystemOut O [LCDS] [ERROR] Exception when invoking service 'remoting-service': flex.messaging.MessageException: ALC-WKS-005-055: An error occurred while retrieving endpoints based on a collection of endpoit ids.
incomingMessage: Flex Message (flex.messaging.messages.RemotingMessage)
operation = invoke
clientId = F7149C09-0009-5D6D-9BC1-6E4D6695EECD
destination = endpoint-actions
messageId = FCC3F5ED-6BBF-5973-327A-4BCF1E12CBDF
timestamp = 1229632510208
timeToLive = 0
body = null
hdr(DSId) = F708081D-AF1A-E1AC-E3A6-3D38677596EC
hdr(DSEndpoint) = workspace-polling-amf

In workspace I get this:

An error occurred during the operation (endpoint id 842). (ALC-WKS-007-027)

thank you