UniBasic Commands Reference - Rocket Software

MDPERFORM
Syntax
MDPERFORM str.expr [CAPTURING, dyn.array.var]
[RETURNING, dyn.array.var] [RTNLIST int.expr] [PASSLIST int.expr]
[PASSCOM]
MDPERFORM str.expr [RETURNING, dyn.array.var]
[CAPTURING, dyn.array.var] [RTNLIST int.expr] [PASSLIST int.expr]
[PASSCOM]
Description
The UniBasic MDPERFORM command executes various UniData commands,
sentences, or paragraphs within a UniBasic program while transferring lists to and
from the executed commands.
You can nest MDPERFORM. For example, in program A an MDPERFORM
statement, which has a “CAPTURING var1” clause, invokes program B. Program B
contains a second MDPERFORM statement that also has a “CAPTURING var2”
clause. The output of programs A and B is sent to var1 and var2 respectively.
You can nest only two MDPERFORM statements. To increase the number of nested
levels:
For the entire system – Enter a higher number for the udtconfig file variable
MAX_CAPT_LEVEL.
For this process only – Enter a higher number for the environment variable
MAX_CAPT_LEVEL.
Note: MDPERFORM does not pass select lists unless you explicitly specify them. In
this way, you maintain full control and protection over them.
STACKCOMMON
The ECL STACKCOMMON command makes use of common areas more flexible,
although it requires additional memory. STACKCOMMON settings have the
following effects:
1-466 UniBasic Commands Reference