$EcbDGet
Function
Get string data associated with an Event Control Block (ECB)
Syntax
$ECBDGET(ECB-number | 'CPQZ')
Where:
- ECB-number is a string with a numeric value from one to the NECBS parameter that identifies the ECB from which to retrieve the text. The ECB-number can be expressed as a numeric literal, a %variable, or a field name.
- CPQZ is a named ECB used by the NonStop/204 facility to automatically post an extended quiesce. See the Rocket Model 204 System Manager's Guide for an explanation of the facility.
To use CPQZ, you need not set the NECBS parameter. CPQZ can be expressed as a literal, a %variable, or a field name. When CPQZ is specified, the value of the $ECBDGET function can be non-null (except for error values) during only extended quiesce. CPQZ is internally cleared to null when the system exits extended quiesce.
Usage
When the $ECBDGET function is successful, it returns your data as a text string up to 255 bytes long. If you make a coding mistake, you may receive one of the following return codes as a string.
| Return code | Meaning |
|---|---|
| 2 | Bad argument specified |
| 3 | NECBS parameter is not specified or is zero |
| 4 | The input argument is less than one or greater than the NECBS parameter |
| 5 | NUSERS = 1 |
| 8 | No argument specified |
| 9 | Checkpoints are inactive, if using extended quiesce ECB named CPQZ |
| 12 | Invalid argument CPQZ or invalid argument following QZSIG. |
The $ECBDGET function retrieves data set by either the $ECBDSET or $POST functions for the specified ECB.
Example
%X = $ECBDGET(17)