WebDynpro ABAP layout doesn't work through SAPRouter

Question

Hello Everyone
I am new in the Web Dynpro ABAP environment.
When I am at the office, I can use SE80 to develop a web dynpro abap program. I can see the layout of the views,
But when I am outside of the office an want to work through SAPRouter I cannot see the layout of the views.
I am obtaining the following eror:
This Program cannot display the web page.
Any idea why through SAPRouter it doesn't work? And what to do to make it work?
Regards
dstj

Answer 1

Your problem has to do with FQDN (full qualified domain name).
SAP uses system parameter icm/host_name_full to determine the full qualified domain name for your webdynpro applications.
If this parameter is not set, SAP queries the operating system for the FQDN.
To check if this parameter is defined right, use SAP transaction SICF:
1) Execute transaction SICF;
2) Click the execute button (F8 key);
3) Choose menu path Goto --> ICM Monitor;
4) Choose menu path Goto --> Parameters --> Display.
In the list that will be shown, look for parameter icm/host_name_full (use the binoculars to find it). This parameter should be at the end of the parameter list. If this parameter does not exist or if its contents is not a FQDN, then you are in trouble accessing all websynpro funcionalities from outside of your network.
In this case you should change this parameter to reflect a FQDN (full qualified domain name).
To change this parameter:
1) Execute transaction RZ10;
2) Enter the profile name of the active instance (click F4 to get all possible values. There shouldn't have many. Choose the one which is an instance profile and that is named after your system name and/or system ID);
3) Click on the Extended maintenance radio button on the Edit profile group below profile name and click on the Change button;
4) If the icm/host_name_full parameter is already there, change its value to the FQDN of your network. If the parameter is not there, click on the create parameter button on the toolbar, type the paramter name (icm/host_name_full) and its value (which should be the FQDN of your network);
5) Finally, keep clicking the back (F3) key untill the system tells you that the modifications are not saved and asks if you want to save them. Answer YES.
Now, AFTER RESTARTING YOUR SAP APPLICATION SERVER, the access to all webdynpro functionalities in SE80 should work without requiring a modification of your windows HOSTS file.
REMEMBER: YOU WILL HAVE TO RESTART YOUR SAP APPLICATION SERVER FOR THESE CHANGES TO WORK!!!
Hope the above helps!
Any doubts, feel free to get in touch.
Cheers!
Lino