EPMDocument check in/check out failed with error: "Operation failed because the user did not have the necessary permission on the following objects to perform the operation" in Windchill PDMLink

=> hasAccess: User_Name, object = CAD Part  - Name (wt.epm.EPMDocument:IDA2A2), permission = Modify
     type = WCTYPE|wt.epm.EPMDocument|<SubType>, domain = Site, Organisation - <Org Name>, Library - <Library Name> /Default/<Library Name> (wt.admin.AdministrativeDomain:###), state = <Life Cycle State>
     checking for policy access ...
=> getPolicyAcl - IN: = wt.admin.AdministrativeDomain:###, wt.epm.EPMDocument|###, <Life Cycle State>
<= getPolicyAcl - OUT - acl from cache: wt.admin.AdministrativeDomain:###, wt.epm.EPMDocument|###, <Life Cycle State>
+ Participant: cn=ORG ADMIN,o=<Org Name>,ou=people,cn=AdministrativeLdap,cn=Windchill_11.1,o=ptc (wt.org.WTGroup:###): [Full Control (All)]
+ Participant: cn=group1,ou=people,cn=administrativeldap,cn=windchill_11.1,o=ptc (wt.org.WTGroup:###): [Read, Create, Download, Modify Content, Create By Move]
+ Participant: Librarysmanager (Library - <Library Name>) (wt.org.WTGroup:###): [Full Control (All)]
+ Participant: Team Member (Library - <Library Name>) (wt.org.WTGroup:###): [Read, Download]
- Participant: cn=group1,ou=people,cn=administrativeldap,cn=windchill_11.1,o=ptc (wt.org.WTGroup:###): [Modify, Modify Security Labels]
=> AclEntrySet.getPermissionMasks: uid=User_Name,ou=people,cn=AdministrativeLdap,cn=Windchill_###,o=ptc, id = wt.org.WTUser:####
<= AclEntrySet.getPermissionMasks: (from cache), grant = -#### [Read, Create, Delete, Administrative, Revise, New View Version, Change Permissions, Download, Modify Content, Change Domain, Create By Move, Change Context, Set State, Modify Identity], absolute deny = 0 []
object is ownable - check for owner rights
checking for ad hoc access ...
<= hasAccess is false: User_Name, object = CAD Part  - Name (wt.epm.EPMDocument:IDA2A2), permission = Modify