Problem with maf2daa and how to deal with multiple samples?

I had a problem using maf2daa in STEP 3 and the error is:;
STEP 3 - Writing into daa-file: /bio/home/xiao/Tim-16S-nanopore/magan-test/./DAA-files
Exception in thread “main” java.lang.OutOfMemoryError: Java heap space
at daa.converter/maf.MAF_Converter$BatchReader.(
at daa.converter/
at daa.converter/startUp.MainConverter.main(

I think this error is Memory error in my server. Do you know how to fix it?

In addition, I have another questions.

  1. Can maf2daa can deal with multiple samples (.maf) in one folder?
  2. I have 20 samples that concatenated into one fasta file. Then I used lasal to make it into one .maf file. Is that right way to deal with multiple files?
    Thanks in advance!