Merge branch 'dev' of http://47.101.211.7:10101/r/TIANMA_JITUAN into dev_lhj

hongji.li

2023-11-03 aefafd2142478d4fb07d6b8b45c3047e247389e0

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Quintiq file version 2.0
#parent: #root
Function CalcDuration
{
  TextBody:
  [*
    // soh yee Feb-13-2014 (created)
    value := guard( this.End() - this.Start(), Duration::Zero() );
    
    this.Duration( value );
  *]
}