Error in file.exists(filepath) : invalid 'file' argument

[In Ki Cho]

I am lost here. 

I ran alignment with BWA-Meth and got methylKit output from methylDackel. 

The output file has 7 columns 

chrBase, chr, base, strand, coverage, freqC, freqT

I imported the files into R and tried to run MethylKit, but once I created the file.list and run 

> myobj=methRead(file.list,

+                sample.id=list("DMSO1","DMSO2","DMSO3","SAM1","SAM2","SAM3"),

+                assembly="hg38",

+                treatment=c(1,1,1,0,0,0),

+                context="CpG",

+                mincov = 10,

+                dbtype = "tabix",

+                dbdir = "methylDB"

+                )

It ran for a like 2 hours and all I get is

Received list of locations.

creating directory methylDB ...

Error in file.exists(filepath) : invalid 'file' argument.

Should I not import the Dataset using From Text (base) and tab delineated option?

Am I missing hg38 assembly?

When I ran MethylDackel, I did extensive trimming with mbias. Could that have caused the problem? Should I lower mincov to 3 or something?

What does invalid file mean? Any help will be immensely appreciated. 

Thanks,

[In Ki Cho]

NVM guys. I answered my own question. I was stupid to import files into R.