There are several problems with your schematic and PCB that you need to address before you can safely submit your PCB for manufacture. 1) Your PCB has not been created directly from your schematic, there are changes you have made to the PCB since trying to Convert the schematic to a PCB  so there are things in the PCB that are not in the schematic such as the package for the 4 pole changeover relay and the batteries B1 to B4; 2) There confusing component prefixes in your schematic: for example for the three SB5100 diodes and the relays; 3) In the schematic, the highlighted net is not joined to the left hand (anode) end of the diode because the wire does not connect to the end of the anode pin;  4) In the PCB the pins you have labelled as + and - on the 12VDC input connector (top left) are joined together: they have the same netname S$377; 5) Pin1 of the Relay just to the right of this connector has the same netname, S$486 as a track between the Board.VDC.OUT + connector pin and D1 Before going any further with your design I think it would help you to read: [https://easyeda\.com/andyfierman/Welcome\_to\_EasyEDA\-31e1288f882e49e582699b8eb7fe9b1f](https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f)

Hi, The JLCPCB gerber viewer has some bug, if your gerber looks good at  Gerber Viewer Gberv: [http://gerbv.geda-project.org/](http://gerbv.geda-project.org/) please ignore this message and keep going.

@abdul07, What Tutorials says is correct but as described above, you appear to have other issues with your design that need to be addressed before you submit your PCB design for manufacture.

For example: 

Hi Guys. I was researching the problem of Gerber analysis reporting that it cannot identify the minimum track spacing and have read the posts preceding this. Unlike Abdul07 I have cleared all DRC errors, checked that there are valid values in all fields of the DRC dialogue, and all footprints on my board come from components in the schematic taken from the library, and therefore have, as far as I can see, valid footprints. However I should say that I created some myself in Schematic Lib and PCB lib to make the footprints accord with the chosen components RS-Online datasheets. All parts therefore have RS part numbers. Nevertheless I still get the "Minimum track spacing cannot be identified" warning. Just to confirm what Tutorial said, can I safely ignor it, or what other checks should I carry out first?

When you submit the board to EasyEDA, put a note in the remarks to say that all DRC errors have been cleared but that the JLCPCB Gerber viewer still shows the warning you have described.

@NuttyProfessor47 Hi， It is a known issue, JLCPCB working on it. the analysis is beta version now.

@andyfierman Thanks, will do.

@Tutorials Thank you. I'll keep a watch out for the update and follow Andy's advice in the meantime.