cuffnorm says "Error: cuffdiff requires at least 2 SAM files"

[yuifu]

When I run cuffnorm (v2.2.1 (4237)) on single CXB file, I received a error massage "Error: cuffdiff requires at least 2 SAM files".

I found the corresponding code in cuffnorm.cpp. cuffnorm.cpp

Can't I apply cuffnorm on single CXB file?

[Landau1994]

When I run cuffnorm (v2.2.1 (4237)) on single CXB file, I received a error massage "Error: cuffdiff requires at least 2 SAM files".

I found the corresponding code in cuffnorm.cpp. cuffnorm.cpp

Can't I apply cuffnorm on single CXB file?

I have the same issue, I use this command to fix this bug

cuffnorm -no-update-check -p 20 -o $OUTDIR/cuffnorm -L S1_1, S1_2 genes.gtf S1/abundances.cxb S1/abundances.cxb