SAP Note 22235 - OSS1: What to do, if R/3 does not run?

Symptom:

A logon to the OSS using Transaction OSS1 is not possible if the R/3 System is not running. However, a logon to OSS is often a very important factor in dealing with problems with R/3.

Solution

Transaction OSS1 offers the option to display the parameters used when calling up the SAPGUI under Parameters -> Technical settings -> Parameters -> PC Callup parameters
These parameters are strongly dependent on the SAP routers defined, both from the customer's point of view and that of SAP. For this reason, no general value can be entered here, Transaction OSS1 will determine these parameters at runtime.
This parameter string can then be copied to the command line of a new SAPGUI icon. You then can log on by simply starting the OSS with this icon, without using R/3.

However, the installation of this special SAPGUI icon is only necessary on a few PCs and use should be limited to emergencies as the most favorable OSS application server is not determined, rather the application server predefined in the parameter string.

For interested experts: -----------------------The parameter string supplied by Transaction OSS1 consists of blocks with the following structure:
/H//S/
You can put as many of these block together as you like, each of which describes one computer on the path from the SAPGUI to OSS.
As , you can enter either the IP address or the (unique!) host name of the computer. As you should use the service name (for example sapdp99 for instance number 99) or the port number (for example 3299 for instance number 99).

An example:
On the computer 'Customer1' (IP address w.x.y.z), a SAP router runs under default Service '99'. The link to SAP is via the SAP router on sapserv3 (IP address 147.204.2.5), Service '99' to the OSS on oss001 with instance number '01'.

The parameter string would then have the following layout:
/H/w.x.y.z/S/sapdp99/H/147.204.2.5/S/sapdp99/H/oss001/S/sapdp01
<------- 1 --------><---------- 2 ----------><------- 3 ------->

1. Computer 'Customer1' with SAP router on Service '99'

2. Sapserv3 for SAP with SAP router on Service '99'

3. Online Service System on 'oss001', Service '01'.

Note: You cannot use the above example as a parameter string.

Please have the string determined by Transaction OSS1.