Sometimes when you call WebDynPro we get an error 500.
How can I solve it quickly, without having to reboot the system.
To do this, we must start a transaction SMICM
select the menu goto -> Services

Сhoose service HTTP

Select menu Sevice ->Change

Specify a value greater than 60. For example 9000

Then agree with change. You will get a warning. Agree.

As a result, you get a picture

After this timeout should abyss
If you do not help run the transaction RZ11 and modify the following parameters
abap/timeout
icm/timeout
icm/keep_alive_timeout
icm/conn_timeout
icm/wp_roll_timeout
See more here http://help.sap.com/saphelp_nwpi711/helpdata/en/48/3ae05299c172d0e10000000a42189c/frameset.htm