start has a *very* weird syntax. If the first argument has quotes, it's used as the console title. If you weren't able to drop the quotes, the workaround would be: 

system(q{start "" "C:\\...\\calc.exe"});

[download]

Simpler: 

system(-1, "C:\\...\\calc.exe");

[download]

In reply to Re: system CALC.exe opens command prompt ?? by ikegami
in thread system CALC.exe opens command prompt ?? by perlpreben

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