The gadget spec URL could not be found

SAP ABAP Ports
Below listed ports are most important ports which are used by AS ABAP. On Unix systems, you can use file "/etc/services" to assign the ports to the services. 
For Windows, you can find the file under "c:\Windows\system32\drivers\etc\services".

SAP ABAP important ports

If your SAP system is connected to any other SAP system ,services file should  have entries for all those system ports as well.

You can easily remember the important ports in following sequence.

D-G-M   32-33-36

D  = 32<NN>  SAP System dispatcher port
G = 33<NN>  SAP System Gateway port
M = 36<NN>  Sap Message Server port

Where NN is the instance number.

Reference:
http://help.sap.com/saphelp_nw2004s/helpdata/en/42/db8c45e873162ee10000000a1553f7/content.htm
Note 540379 - Ports and services used by SAP
Note 52959 - sapms..., sapdp.., sapgw.. unknown (or not found)

The gadget spec URL could not be found
The gadget spec URL could not be found