[AX2012] Error: Logon failed for the unattended execution account

Error while setting server report parameters. Error message: The report server has encountered a configuration error. Logon failed for the unattended execution account. (rsServerConfigurationError)

Solution:

1. Check your Service Account user & password in Reporting Service Configuration Manager.
2. Check your Execution Account user & password in Reporting Service Configuration Manager.

[AX2012] No connection could be made because the target machine actively refused it 8201

Error: "No connection could be made because the target machine actively refused it 8201"
Solution: In database server, create client configuration to AOS Server make sure the Business Connector also point to AOS Server.

[AX2012] No Fiscal Year Calendar Has Been Defined For Ledger

When posting Product Receipt the error show that Cannot create a record in Global address book and No fiscal year calendar has been defined for ledger. In this case, the user don't have access to class SubLedgerJournalizer method getFiscalCalendarPeriod. Give the access to the user privileges.

[AX2012] Error code: 38 = Filename too long

When print ssrs report VendInvoiceDocument the error showed up. It said that the filename is too long. After I checked the size of the file (my case: axapd.alt), the file was corrupted. In normal size the file size is 8KB but currently the size is 1KB. Stop the AOS and replaced the corrupted file with the normal file and then start the AOS. Well, it worked fine.

[AX2012] The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel

Error message showed when SSRS report was opened : The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

Solution: Check windows and router firewall.

[AX2012] Ax error "A user session on the server could not be created. Try to start the client again. If the problem continues contact Ax Administrator"

I checked the Event viewer and found that the log file was full:
Object Server 01:  The database reported (session 1 (-AOS-)): [Microsoft][SQL Server Native Client 10.0][SQL Server]The transaction log for database
'AXDatabase' is full due to 'LOG_BACKUP'. . The SQL statement was: "UPDATE SQLSYSTEMVARIABLES SET VALUE='34' WHERE PARM='SYSVARID'"

Solution:
Stop the AOS.
Shrink database log file and start the AOS.

[AX2012] SSRS Report Error at The Fisrt Time After Restarting AOS

"The DefaultValue expression for the report parameter ‘AX_CompanyName’ contains an error: Request for the permission of type ‘System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089′ failed. (rsRuntimeErrorInExpression)"

Solution:

1. Go to System administration>Setup>System>System service accounts.
2. Retype the business connector proxy account ("domain\username").