Dynamics AX 2012 - Labels are not showing correct after Minor upgrade from AX 2012 to AX 2012 R3

If labels are showing like @SYS305949 after upgrade from Microsoft Dynamics AX 2012 to AX 2012 R3.
Resolution:
Try to do these steps one by one and check whether your labels files are appearing:
1.    Restart the AOS(s) to ensure that the change takes place.
•    Press Window + R.
•    Type services.msc then Press OK.
•    Services form will get open as shown in below screenshot.

•     Select Microsoft Dynamics Ax Object Server….** service.
•     Press Restart 

2.    Export the label files (AOT > Label files) and then Re-imported it and restart the AOS once.

Export Label File:
Open AOT, Expend Label node. Choose Label file of required language to export e.g.  en-us. You can do it for individual language or you can select multiple language all in once.

Exported file will save on selected path with extension “.ald”.

Re-import same label file which you exported

Right click on Label node in AOT and select “Create from File”, choose ald file to import then click create.

Restart AOS Once:

Follow steps shown in point 1

3.    Do Tools/caches refresh Elements, Refresh Dictionary and Refresh Data

Open Ax client then open Application object tree (AOT).
Go to Tools Menu=> Caches
You can click one by one: Refresh dictionary, Refresh data and Refresh element.

   4.    Generate incremental CIL.