SB37 JCL error to small a size? - jcl

Question

The following space allocation is giving me an sB37 JCL error. The cobol size of the output file is 100 bytes and the lrecl size is 100 bytes. What do you think is causing this error? I have tried increase the size to 500,100 and still get the same error.
Code:
//OUTPUT1 DD DSN=A.B.C,DISP=(NEW,CATLG,DELETE),
// DCB=(LRECL=100,BLKSIZE=,RECFM=FBM),
// SPACE=(CYL,(10,5),RLSE)

Answer 1

Try to increase not only the space, but the volume as well.
Include VOL=(,,,#) in your DD. # is the numbers of values you want to allocate
Ex: SPACE=(CYL,(10,5),RLSE),VOL=(,,,3) - includes 3 volumes.
Additionally, you can increase the size, but try to stay within reasonable limits :)

Answer 2

The documentation for B37 says the application programmer should respond as indicated for message IEC030I. The documentation for IEC030I says, in part...
Probable user error. For all cases, allocate as many units as volumes
required.
...as noted in another answer. However, be advised that the documentation for the VOL parameter of the DD statement says...
If you omit the volume count or if you specify 1 through 5, the system
allows up to five volumes; if you specify 6 through 20, the system
allows 20 volumes; if you specify a count greater than 20, the system
allows 5 plus a multiple of 15 volumes. You can override the maximum
volume count in data class by using the volume-count subparameter. The
maximum volume count for an SMS-managed mountable tape data set or a
Non-managed tape data set is 255.
...so for DASD allocations you are best served specifying a volume count greater than 5 (at least).

Answer 3

//OUTPUT1 DD DSN=A.B.C,DISP=(NEW,CATLG,DELETE),
// DCB=(LRECL=100,BLKSIZE=,RECFM=FBM),
// SPACE=(CYL,(10,5),RLSE)
Try this instead. Notice that the secondary will take advantage of a large dataset whereas without that parameter the largest secondary that makes any sense is < 300. Oh, and if indeed it is from a COBOL program make sure that the FD says "BLOCK 0"!!!!! If it isn't "BLOCK 0" then you might not even need to change your JCL because it wasn't fixed block machine. It was merely fixed and unblocked so the space would almost never be enough. And finally you may wish to revisit why you have the M in the RECFM to begin with. Notice also that I took out the LRECL, the BLKSIZE and the RECFM. That is because the FD in the COBOL program is all you need and putting it in the JCL is not only redundant but dangerous because any change will have to be now done in multiple places.
//OUTPUT1 DD DSN=A.B.C,DISP=(NEW,CATLG,DELETE),
// DSNTYPE=LARGE,UNIT=(SYSALLDA,59),
// SPACE=(CYL,(10,1000),RLSE)

Answer 4

There is a limit of 65,535 tracks per one volume. So if you will specify a SPACE that exceeds that limit - system will simply ignore it.
You can increase this limit to 16,777,215 tracks by adding DSNTYPE=LARGE paramter.
Or you can specify that your dataset is a multi volume by adding VOL=(,,,3)
You can also use DATACLAS=xxxx paramter here, however first of all you need to find it. Easy way is to contact your local Storage Team and ask for one. Or If you are familiar with ISPF navigation, you can enter ISMF;4 command to open a panel
use bellow paramters before hitting enter.
CDS Name . . . . . . 'ACTIVE'
Data Class Name . . *
It should produce a list of all available data classes. Find the one that suits you ( has enougth amount of volume count, does not limit primary and secondary space