input file example in galaxy:

WASH7P 0.305384

KLHL17 6.4404

GLTPD1 22.8633

PUSL1 22.9327

CPSF3L 0.446421

SAMD11 0.0267019

output:

AAAS

then the error message complaint is on the tile column.

After updating R to latest version the "grouping" function is no longer working. I have been searching very hard on the internet regarding to this issue. However, I have no luck to get any solution. This issue tracker is my last option by far. I have no idea what happened. 

thank