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od -c input.csv will show you what the input file contains.

It's probably just in DOS format (with both \n and \r) and you just want to delete any \r characters, with:

tr -d '\r' <...

FWIW, this is bash 3.2.48 on OSX 10.7
$ echo $(( 2 ** 63 - 1 ))
9223372036854775807

Not posting your O/S and Shell details is driving me nuts!

We really need to know whether the O/S Shell can cope with numbers above 2147483647 ((2 x 1024 x 1024 x 1024) -1 ). i.e. a 32-bit O/S....

Try this (Array DMGSIZE will contain size of each .dmg file in DMGLIST):

#!/bin/bash
#first part of script which generates the array below
pos=0
for i in ${DMGLIST[@]} #This array contains a...

Or#!/bin/bash
b=(2 4 6)
a=0
for i in ${b[@]}
do
narray[a++]=$((i*2))
done
echo ${narray[@]}

Try:
stat -f "%z" file