attachment with mailx sometimes result in data confusion [not reproducable]

Hi

Ich have a script with SQL*Plus what sends a *.csv to serveral people using M$ Outlook.

$ grep mailx report.sh
(cat /opt/tmp/MSG.txt ; uuencode $data_report report.csv ) | mailx -s "Report" -r xx@xxx.com yyy@yyy.com zzzz@zzzzz.org

On a Solaris box:

$ uname -a
SunOS hostname 5.10 Generic_139555-08 sun4v sparc SUNW,Sun-Blade-T6320

Sometimes in resulting mail there is a data confusion. See screenshot.

1587×486 39.7 KB

Sometimes there is attached a *.csv, like designed. Why? Howto fix?
When customer complains about data garbage, I rerun the script and everything ok..

Are you absolutely CERTAIN that your input files to uuencode never get overwritten while your mail script is running?

Can you please explain me in simple language the technical reason for you input?

Maybe you are right. Bevore sending mail I have this in my script:

rotate_output  ()
{
cp /opt/path/output /opt/path/archive/output.$(/bin/date '+%m')
}

I removed the lines and rerun script about 20 times without error in mail.