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9<title>.open an already existing file</title>
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14<p><u>Open an already existing file</u></p>
15<p><u><br>
16</u>A petri-net file can be oppened by clicking the following icon on the task
17bar which is illustrated below. The same result can be obtained by pressing
18Ctrl-O.</p>
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20<p><img border="0" src="PIPE%20images/2.open.png" width="27" height="27"></p>
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