ERC Protel99 problem, please help!

[padamiecki]

Hello


Did anybody had such a problem during designing schematics:
After completing of the schematic I check it using ERC. And every time I have an error” „floating inputs...”.

Every time then I remove the errors, place wires properly and… the error becomes again.

I have checked electrical grid, snaping, everything!!! But did not find what was wrong??

One strange thing: the same parts once have the errors, other time do not!

Really do not know what to do?

Could you advice something?

[padamiecki]

please?

[Charles Hansen]

In Protel's schematic library, each pin of each component can be defined as an input, an output, et cetera. These definitions set up the rules for the ERC (electrical rules check).

If a pin defined as an input in the schematic library is not connected in the schematic diagram, the default ERC settings will give an error message.

One other thing to watch for is that when you create a component in the schematic library (as opposed to using the ones that come with the program), it is possible to have the pin turned around 180 degrees and not realize it. Then when you draw a connecting wire in the schematic diagram, you are actually connecting to the wrong end of the pin.

Good luck,
Charles Hansen

[padamiecki]

Thanks for your reply

but on the same schematic the same parts are OK,
I mean that during checking with ERC the same parts shows no errors.

[padamiecki]

or maybe could you just tell at which forum I have to ask?

[Charles Hansen]

I would recommend to check at the Protel website and make sure that you have all of the service packs for your version installed. They also have a "Knowledge Base" where you can search for known bugs.

Good luck,
Charles Hansen

[padamiecki]

Dear Charles
I have checked this before,
nobody had this problem
I feel that I have to solve it myself
Thank you