HP 3000 Manuals HP 3000 Manuals
Using EXPLAIN
Use the EXPLAIN subsystem to obtain information about Transact error
messages. EXPLAIN tells you what causes the errors and what actions you
can take to fix them.
When using EXPLAIN, you can provide parameters interactively or from the
MPE command line.
Command-line execution is convenient for looking up one message quickly.
EXPLAIN performs the command specified on the command line and returns to
the system prompt (:). For example, to display information for the error
message TVB 1030, enter:
:EXPLAIN TVB 1030
If you have several messages to look up, you can run the program
interactively by entering the EXPLAIN command without parameters. Look
up one message after another by entering a message type and number each
time you see the EXPLAIN> prompt. If several messages have the same
type, you do not have to enter the type each time.
By default EXPLAIN uses the type of the last message explained or
printed. You can enter commands to print messages, search the message
catalog, get online help, or exit the program. For a list of your
options at any prompt, type ?. If you don't understand a prompt, enter
HELP for an explanation.
The PRINT and FIND commands require additional information to execute.
You are prompted for this information if you do not supply it when
entering the command. PRINT> or FIND> precedes these prompts to remind
you that you are not at the main EXPLAIN> prompt. To break out of these
commands without completing them, enter CTRL Y or EXIT at any prompt.
Example
This example shows what is displayed when you enter EXPLAIN TVB 1070 at
the command line:
---------------------------------------------------------
DATABASE BUFFER NOT ON WORD BOUNDARY (1070)
The data buffer for a database operation must start on a word
boundary. If necessary, insert a one-character fill item before
the first data item of the database list or use the ALIGN option
of the LIST verb.
MSG GROUP: Transact/V
MSG CATALOG: RAPIDCAT.PUB.SYS
MSG KEY: TVB 1070
---------------------------------------------------------
For more examples of using EXPLAIN, see the MPE V Commands Reference
manual.