altium designer 19 constantly crashing on pcb

That net is not created until you compile the project, and that process is managed by code outside of the schematic editor. When you connect two pins with a wire you are drafting your design intentions, not creating an actual net. Using this approach, the schematic editor is actually an intelligent drafting tool, rather than a wiring tool. Analyzes the complete design to check for drafting and electrical errors.Creates the sheet-to-sheet connectivity.Builds a netlist for each schematic sheet.When you are ready to compile the design, choose the Compile PCB Project command from the Project menu. Using a separate file for each schematic means you can easily bring in content from a previous project, and it also means that multiple designers can work on the same project, at the same time. This approach also supports a one-file-per-schematic-sheet model. When the designer thinks it is ready, they compile it - verifying it and building the internal connective model. Using this same approach, the schematic designer can freely place, wire, re-arrange, re-name, and add and delete content from their schematic design. They compile the source to generate the working code only when they think it is ready for compilation. Doing this allows the developer to freely create, edit and modify their source code, using a file structure they choose. Software development tools allow the source to be spread across multiple files, and they separate the creation process from the analysis and compilation process. Neither of these are something that any coder would want. To draw an analogy to software development, it would be like storing all of the source code for your entire application in a single file, and coding in a development environment that recompiles every time you you make a change. Storing all of the data, for all of the sheets in your large multi-sheet schematic, in a single file is possible, but, for a number of reasons, is not the best approach.

To do this with persistence - where the software is keeping track of the connectivity at all times - the component and connective data for the entire design would need to be available when the design is opened, which would require all the data to be stored in a single file.

Ultimately, the software needs to build a connective model of the entire design for both the schematic and the PCB. The software manages the connective data across the schematic and the PCB. What does it mean to compile the design? And why does the design need to be compiled why can't the software just keep track of the connectivity as you create it on my schematic?

Altium designer 19 constantly crashing on pcb