TIMEOUT file.variable, time
file.variable specifies a file opened for sequential access.
time is an expression that evaluates to the number of seconds the program should wait before terminating the READSEQ statement.
TIMEOUT causes subsequent READSEQ and READBLK statements to terminate and execute ELSE statements if the number of seconds specified by time elapses while waiting for data. If either file.variable or time evaluates to null, the TIMEOUT statement fails and the program enters the debugger.
TIMEOUT SLIPPERS, 10
READBLK VAR1 FROM SLIPPERS, 15 THEN PRINT VAR1 ELSE
PRINT "TIMEOUT OCCURRED"