Hello

I have wired behavior at my environment as below
description:

1.       I develop k2 process integrated with InfoPath 2007. my K2
version is 4.8210.3.615
(0807) .

2.      
Yesterday, end user
reported to me a general error appear at InfoPath as below:

Warning

There has been an error while processing
the form

Click continue to resume filling out the
form, You may want to check your form data for errors

Click Start Over to load a new copy of
the form

3.      
Based on the investigation:

a.      
I found the following
errors in SharePoint 2007 Logs:

Server was unable to process request.
---> The worklist item cannot be completed due to the following reason:
Object
reference not set to an instance of an object

b.     
In found the below entries
in the K2 logs:

11:37:15","Debug","Unknown","8038","BytesReceived","SourceCode.Hosting.Server.Services.TCPClientSocket.ProcessIOCPEvent","8038
Received 501 Bytes From
10.1.16.93:1","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189663","c2129f3ae4a54bfb9f0716a753202d0b",""

"432189664","2012-12-03
11:37:15","Debug","System","1035","InternalSessionMarshal","SourceCode.Hosting.Server.Runtime.HostServerBroker.InternalMarshal","1035
Session Marshal 1B0BA4BDDB6089926A5505F6B8032EC5.SourceCode.Security.UserRoleManager.Runtime.UserRoleManagerServer.GetUser","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189664","1d75a229aa0f4a1d969c2b56ccb7ba08",""

"432189665","2012-12-03
11:37:15","Debug","Unknown","8037","SendBytes","SourceCode.Workflow.Runtime.ClientConnection.ProcessICOPEvent","8037
Sending 10.1.16.93:9 Bytes to
194","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189665","58f89ddf2ac14c23b3d229462563f328",""

"432189666","2012-12-03
11:37:15","Debug","Unknown","8040","IOCPThreadProcessingBytes","SourceCode.Hosting.Server.Services.TCPIOCPService.WorkerThread","8040
Processing 378 IOCP Bytes Related To 10.1.16.93:1","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189666","52dc829779724e7aa6cf365a0d963475",""

"432189667","2012-12-03
11:37:15","Info","SystemAudit","24401","AuthUserNative","K2Worker.AuthNative","24401
Authenticated K2:DomainK2install at 10.1.16.93:9 using Kerberos","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189667","5ecbf2de0aa549cfb8221791e874ebca",""

"432189668","2012-12-03
11:37:15","Debug","Unknown","8039","ReceiveBytes","SourceCode.Workflow.Runtime.ClientConnection.ProcessICOPEvent","8039
Receiving 10.1.16.93:9 Bytes From
8","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189668","e6043aa081534ef383556a07d322c323",""

"432189669","2012-12-03
11:37:15","Debug","Unknown","8036","BytesSent","SourceCode.Hosting.Server.Services.TCPClientSocket.ProcessIOCPEvent","8036
Sent 378 Bytes to
10.1.16.93:1","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189669","e2280b7a67e046608e671fc9583b95db",""

"432189670","2012-12-03
11:37:15","Debug","Unknown","8039","ReceiveBytes","SourceCode.Workflow.Runtime.ClientConnection.ProcessICOPEvent","8039
Receiving 10.1.16.93:9 Bytes From 262","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189670","de43b54e59ac461696d1427058b98b09",""

"432189671","2012-12-03
11:37:15","Debug","General","28053","Marshal","K2Worker.Marshal","28053
Marshalling: DelegateWorklistItem
K2:DomainK2install","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189671","68abf0635f9e4d3a9f2e5a07f87686ef",""

"432189672","2012-12-03
11:37:15","Debug","Unknown","8037","SendBytes","SourceCode.Workflow.Runtime.ClientConnection.ProcessICOPEvent","8037
Sending 10.1.16.93:9 Bytes to
114","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189672","d0bcb2bc9ee14150b1e568beabfbdc58",""

"432189673","2012-12-03
11:37:15","Error","EnvironmentServer","15100","Generic","SourceCode.Workflow.Runtime.Management
oSendArchiveX estringe] names]]","15100 Error occurred, ERROR: Object
reference not set to an instance of an
object.","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189673","8889cd67c9cb4bc09a1e0131cfd4a7b4",""

"432189674","2012-12-03
11:37:15","Error","EnvironmentServer","15101","Generic","SourceCode.Workflow.Runtime.Management
oSaveActionInstanceRights ERROR: Object reference not set to an instance of an
object.","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189674","d1ecb2fc3bd746a9a281e6cb5f3777c7",""

"432189675","2012-12-03
11:37:15","Debug","Unknown","8045","SocketDisconnect","SourceCode.Workflow.Runtime.SocketListener.WorkerThread","8045
Disconnected From 10.1.16.93:9","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189675","f6e06ac0f4ca485285651bddaca759b9",""

"432189676","2012-12-03
11:37:15","Error","System","2025","InternalMarshalError","SourceCode.Hosting.Server.Runtime.HostServerBroker.InternalMarshal","2025
Error Marshalling SourceCode.Workflow.Runtime.Management.WorkflowManagementHostServer.SaveActionInstanceRights,
Object reference not set to an instance of an
object.","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189676","8c60b7051a544dafbe96bc167c88ced3",""

"432189677","2012-12-03
11:37:15","Error","System","2025","InternalMarshalError","SourceCode.Hosting.Server.Services.TCPClientSocket.InternalMarshal","2025
Error Marshalling SourceCode.Workflow.Runtime.Management.WorkflowManagementHostServer.SaveActionInstanceRights,
Object reference not set to an instance of an
object.","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189677","14a561bcc716482eaa762b6c891686c9",""

"432189678","2012-12-03
11:37:15","Error","Unknown","8060","ProcessPacketError","SourceCode.Hosting.Server.Services.TCPClientSocket.ProcessPacket","8060
ProcessPacket Error, Object reference not set to an instance of an
object.","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189678","04c9d450beb546a9a8ce04be3aa45cb8",""

"432189679","2012-12-03
11:37:15","Debug","Unknown","8040","IOCPThreadProcessingBytes","SourceCode.Hosting.Server.Services.TCPIOCPService.WorkerThread","8040
Processing 1367 IOCP Bytes Related To
10.1.16.93:178","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189679","3849455bc613429284af3666eed6425b",""

"432189680","2012-12-03
11:37:15","Debug","Unknown","8036","BytesSent","SourceCode.Hosting.Server.Services.TCPClientSocket.ProcessIOCPEvent","8036
Sent 1367 Bytes to
10.1.16.93:178","system","fe80::8987:3f7e:3ee:af25%10","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost ServerBin","432189680","6384db29001c40d3b33b0c62807ebfb6",""

"432189681","2012-12-03
11:37:17","Debug","Unknown","8047","SocketConnect","SourceCode.Workflow.Runtime.ClientConnection.ProcessICOPEvent","8047
Connected to 10.1.16.93:10","anonymous","0.0.0.0","BBKWFAPP:C:Program
Files (x86)K2 blackpearlHost
ServerBin","432189681","beb78bcaeeae4b219376929f79d09318",""

4.      
In addition to that, I was
trying to delegate the process to another user from K2 workflow workspace and I
got the following error in GUI:

ActionInstanceRights could not be saved: Object reference not set to an
instance of an object

Finally, This is happen for certain
processes yesterday ((approximately 5 processes)) and today end0users report to
me another 20 processes with the same issue.

Can anyone help me?