The "99" versions behavior is a fallback mechanism that in general should be avoided. What's happening is that the rendition job is configured to (1) create a new version of the destination document, and (2) copy the version name from the source document when creating that new destination version. ProjectWise does not allow two versions of the same document to have the same version name. So imagine the source document is "foo.dgn, version A" and you're creating versioned PDF renditions. If 'copy version name' is checked, the first time the DGN is renditioned, you'll create "foo.pdf, version A" in the destination folder. If that same document version is renditioned again, for whatever reason, you're asking iCS for PDF to create a new version of "foo.pdf", also with version name "A". That isn't permitted. iCS has PDF has two choices: fail the document or create a new version with a different name. iCS does the latter. It appends a ".0", ".1", ".2" etc. suffix to the desired version name until it finds one that's unique for the destination document. You end up with "foo.pdf, version A", "foo.pdf, version A.0", "foo.pdf, version A.1", etc. The product does that until the ".99" suffix is reached, at which it decides something is obviously wrong and starts failing. Since ProjectWise versions are supposed to be immutable, creating a new PDF of a document version for which a PDF has already been created indicates some type of workflow problem. If it's not a workflow problem, and you really do just want a new version to be created every time a rendition is made, then you should uncheck the "copy version name from source document" property in the rendition profile output destination section. Then the PDF version names are created according to the destination datasource rules. Assuming alphabetical version names, repeated renditions of "foo.dgn, version A" would yield "foo.pdf, version A", "foo.pdf, version B", "foo.pdf, version C", etc. iCS for PDF would never be forced to append a numeric suffix and -- as far as I know -- there is no arbitrary limit to how many versions a document may contain.
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