UniBasic Commands Reference - Rocket Software

Parameters
The following table describes each parameter of the syntax.
Parameter Description
1-456 UniBasic Commands Reference
dim.array Specifies the dimensioned array into which the values are read.
FROM file.var Specifies the file from which to read.
If you do not specify a file.var, UniData reads from the default
file. If no default file is open, a fatal READ error occurs.
A default file is one for which no file variable is assigned in the
OPEN statement.
record.ID.expr Specifies the record from which to read the attributes.
ON ERROR statements Specifies statements to execute if the MATREADU statement
fails with a fatal error because the file is not open, an I/O error
occurs, or UniData cannot find the file.
If you do not specify the ON ERROR clause and a fatal error
occurs, the program terminates.
LOCKED statements Specifies statements to execute if the record is locked by another
user. If you do not specify a LOCKED clause, the program waits
until the lock on the record is released. You can place the
LOCKED clause after the FROM clause.
Use the ECL command DEFAULT.LOCKED.ACTION BELL
to beep the terminal while waiting for the record to be unlocked.
THEN statements END THEN executes if the read is successful. END is required to
terminate multiline THEN statements.
ELSE statements END ELSE executes if the read is not successful or the record (or ID)
does not exist. END is required to terminate multiline ELSE
statements.
MATREADU Parameters