PTC Creo ModelCHECK Teacher：重新生成错误
重新生成错误是当重新生成模型时，Creo Parametric 在消息窗口中报告的警告消息。
导致重新生成错误的原因
模型中的很多问题都有可能导致重新生成问题。下表描述了其中的一些问题：
WARNING: external reference not present, SURFACE frozen (feat id: xxx).
WARNING: cross-section xxx may be incomplete.
WARNING: external reference not present, placement frozen (feat id: xxx).
WARNING: xxx is entirely outside the model.
WARNING: xxx is entirely inside the model.
WARNING: xxx is entirely inside the volume; volume unchanged.
WARNING: xxx is entirely inside the model; model unchanged.
WARNING: xxx is entirely outside the volume; volume unchanged.
WARNING: xxx is entirely outside the model; model unchanged.
WARNING: Design intent is unclear.
WARNING: Design intent is unclear. Use "Geom Check" menu for details.
WARNING: Design intent is unclear. Use "Info"/"Geom Check" menu for details.
WARNING: Design intent is unclear in xxx.
WARNING: Design intent is unclear in xxx. Use "Info"/"Geom Check" in Part mode.
WARNING - Coordinate system xxx of assembly xxx has been frozen.
WARNING: external reference not present, coord system frozen (feat id: xxx).
WARNING: external reference not present, feature frozen (id:xxx).
WARNING - Datum (internal id = xxx) of assembly xxx has been frozen.
WARNING: external reference not present,datum plane frozen (feat id : xxx).
WARNING: external reference not present,placement frozen (feat id: xxx).
WARNING: external reference not present, SURFACE frozen (feat id: xxx).
WARNING: instance xxx no longer exists in driving UDF xxx.
WARNING: Can not update placememnt of member(Mxxx).
WARNING: Incomplete component xxx is frozen.
WARNING: Component xxx is frozen.
WARNING: external reference not present, SPRING BACK frozen (feat id: xxx).
WARNING: external reference not present, SURFACE frozen (feat id: xxx).
WARNING: Feature xxx ( xxx ) in assembly xxx is unattached.
WARNING: external reference not present, location frozen (feat id: xxx).
WARNING: xxx is entirely inside the model; model unchanged.
WARNING: xxx is entirely outside the model; model unchanged.
WARNING! Model geometry for drawing view is missing.
WARNING: merged feature xxx with obsolete external references.
WARNING: Design intent is unclear. Use "Geom Check" menu for details.
WARNING: external reference not present, datum axis frozen (feat id:xxx).
WARNING: external reference not present, datum point frozen (feat id: xxx).
WARNING: Reference part xxx not found.