is/HTTP/show_detailed_errors is a SAP Parameter attribute which is used to control Form of HTTP error pages (short or detailed) information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter determines the standard form of HTTP error messages that
the server (ICM or SAP Web dispatcher) creates and sends to the client.
The parameter can have the values TRUE or FALSE. The default value is
FALSE.
The parameter affects the contents of the error pages of the ICM or SAP
Web dispatcher, as follows:
TRUE: The error page contains details about the cause of the error (name
of the application server, date, module, line, component, description of
error).
FALSE: The error page does not contain details about the cause of the
error. With some errors, an error tag (for example, {00060025}) is
displayed. You can use this tag to find the error details in the
relevant trace file (dev_icm or dev_webdisp).
For security reasons the details should not passed to the client. We
therefore recommend that you set the parameter to FALSE.
If the details are not critical to security, you can set the value to
TRUE. The details can be useful for troubleshooting.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.