Array too small. Increase MVSPRM

I'm trying to read files using the READ_ALIGNMENT command. However, the file cntains 1701 sequences. The error I receive is the following:

amaxseq_223E> Array too small. Increase MVSPRM current maximum, current need: 505 1703 recover____E> ERROR_STATUS >= STOP_ON_ERROR: 1 1

Is there any way to increase MVSPRM ?

Thanks in advance.