Karyotype file of dual comparison error

[Hannah1746]

Hello.

I am trying to run:

require(RIdeogram)
library(devtools)

karyotype <- read.table('karyotype.txt', header = T)
synteny <- read.table('synteny.txt', header = T)

ideogram(karyotype = karyotype, synteny = synteny)

My files look like:
karyotype.txt
Chr Start End fill species size color
Myx_Chr22 1 47849308 139b08 B 9.5 139b08
Myx_Chr43 1 38023304 139b08 B 9.5 139b08
Myx_Chr27 1 46332826 078dd8 A 9.5 078dd8
Myx_Chr42 1 38410338 078dd8 A 9.5 078dd8

synteny.txt
Chr1 start1 end1 Chr2 start2 end2
22 14531668 14595454 27 32941637 32994325
22 14811096 15022136 27 32437958 32709008
22 15667970 15705569 27 31616867 31646678
...

When I run this code I get this error:

Error in [<-.data.frame(tmp, i, 8, value = c(B = NA_real_)) :
new columns would leave holes after existing columns

I am just trying to understand what is going on.

Thank you for your time.