I tried to use wigCorrelate to correlate the two ChiP-seq wig files I generated by MACS1.4, but I ran into an error:
The wig files contained is variable step and contain all chromosomes.
Overlap on chr1 between items starting at 19999990 and 20000000.
Please remove overlaps and try again
It is very strange as when it exceeded the chr1 length and either of my two wig files have lines in chr1 at this position.
The same error message recurr even if I tried wigToBigwig.