r8279 should fix this problem. The issue was deletion of characters in the haplotype behind the actual end. HTH *m Am 02.12.2010 um 15:58 schrieb Mat: > Hi there! > > I got a problem with mason for 454 read simulation. The command was: > > mason 454 -sq -mp E_tenella.fasta > > (Eimeria tenella genome) > > The error message: > .... > contig # 2148/4707 > contig # 2149/4707 > contig # 2150/4707 > contig # 2151/4707 > contig # 2152/4707 > contig # 2153/4707 > /home/mat/seqan/seqan-trunk/projects/library/seqan/sequence_journaled/journal_entries_sorted_array.h:394 Assertion failed : it->virtualPosition >= delta was: 216739043537519363 < 18230286505148746552 > Aborted > > Any suggestions? > > Thanks! > > best, > > mat > <ATT00001..txt>