Help: velvetg is trying allocate 2251799813685248 bytes

Question

[scchess]

I have a very small data-set for metagenomic. The largest .fa file is about 15349 bytes and there are six of those files.

I am following the instructions on http://metavelvet.dna.bio.keio.ac.jp/MV.html exactly. In particular running velveth to construct a directory of k-mer hash table. It completed immediately most probably because my data set is small enough. Next, I tried running velvetg exactly as shown in the web site. But I got

velvetg DF1 -exp_cov auto -ins_length 260
[0.000000] Reading roadmap file DF1/Roadmaps
[0.000391] 46 roadmaps read
velvetg: Can't calloc 281474976710656 void*s totalling 2251799813685248 bytes: Cannot allocate memory

This is clearly nonsense. Does anybody know how to work with the assembler?

[Antonio R. Franco]

What value of kmer did you select in velveth?

[scchess]

51 exactly as recommended in the web site.