This page identifies a possible issue, inconsistency, concern, error, or bug!
One of the ways Webel IT Australia helps promote tools, technologies, and languages is by donating a lot of time identifying, tracking, and reporting potential issues, in order to help vendors and developers improve the tools and technologies. In some cases, we also offer workarounds and advice for users. All issues tracked on our public site are offered most constructively and with sincerest gratitude to the tool vendors and technology developers.
In Figure 60: Hydraulics blocks, ports, & component properties, the
resistance:ViscousResistancehas to be treated as a PhSVariable not a PhSConstant or the system of equations for
ConnectedTanksis ill-formed. Otherwise get an invalid system:
'The model has 6 variables and 7 equations.'Even though
resistance:ViscousResistanceis effectively a constant (as it is always computed from values that don't change with time) it is in fact handled like a variable via a Constraint: