assertion failed?

[Notjohn]

I've never run into this one before! I get a validation error on Epubcheck that says:

assertion failed: different playOrder values for navPoint/navTarget/pageTarget that refer to same target

The error is at line 21, position 45. Line 21 reads as follows:

<navPoint id="navPoint-2" playOrder="2">

And position 45 is the blank space following the closing angle bracket, so evidently there's something missing.

There is a similar error for each chapter of the book. What have I done to myself this time?

Thanks - NJ

[Notjohn]

I checked my toc.nx against an earlier book and noticed a seeming omission. I added the line:

</navLabel>

to close out a label, then ran epubcheck again. All the earlier errors had vanished, and now I get flagged four times for what seems the same error:

The element type "navMap" must be terminated by the matching end-tag "</navMap>".

This seems very strange because the flagged line 51 is NOT the end of the map, and </navMap> does indeed appear where I think it ought to be, on line 112 just before the terminating line </ncx>

Perhaps it's obvious, but I have never before had occasion to edit the toc.ncx file!

[Notjohn]

Oh, never mind! (as the lady used to say on television).

I found the error, consisting of two closing </navPoint> tags.

You see how invaluable this forum is? By having to specify my problems, so as to ask the question, I found the answer!

[Jellby]

It happens to me very often (not only in this forum, but in any other forum, mail list, etc.) that as I describe my problem and try to provide all the information needed, I eventually find the solution myself even before posting the question.

[mrmikel]

It is often easier to find other's mistakes than one's own. I just spent nearly a week trying to solve a problem I created. If it had come to me as I created the mistake, I would have seen it at once. But since I NEVER do that, I didn't bother to check until days later!

[BetterRed]

Originally Posted by Jellby

It happens to me very often (not only in this forum, but in any other forum, mail list, etc.) that as I describe my problem and try to provide all the information needed, I eventually find the solution myself even before posting the question.

- but not always immediately, if its system s/w or h/w related I often find the solution several days later, after getting no responses, or only red herring responses.

BR