This fix is suboptimal, because the other program will read bytes from the file that aren't the "final" bytes (which won't be written until step 8).Top 4 Download periodically updates software information of dng jpg full versions from the publishers,īut some information may be slightly out-of-date. That way, the open won't fail if another program also has the file open for reading. Open the file in step 4 for read access/read share mode instead of read/write access. That way, no other program can access it until it is fully written and closed.ī. Keep the file open from step 1 all the way through step 9, and get rid of the gratuitous rename. But if it really is necessary to write the file twice, then there are two possible fixes:Ī. Eliminating the second write would avoid the problem and speed up exports. some kinds of backup programs).Ī LR architect should review why the file is being written twice instead of just once. It could also happen with file utilities that are copying files in background (e.g. So it's not surprising that when Bridge is open on the export folder, this problem happens fairly often.īut this problem is not specific to Bridge - any file viewer, including Windows Explorer, could reasonably try to read the exported file to create a thumbnail, right after step 3. The trace shows it continually trying to open newly created files, every couple of milliseconds. When it does, LR thinks some kind of file problem has occurred, deletes "file.jpg", and reports an error to the user.īridge is particularly aggressive at monitoring folders for new files so it can create thumbnails. But a file viewer like Bridge may have just opened the file right after step 3 to construct a thumbnail, and if it still has the file open at step 4, LR's reopen for read/write access will fail. Problem 2: In step 4, LR 6 tries to reopen the just-written file with read/write access but then proceeds to just read the file. The author of Exiftool observed that it appears that the metadata is first written in a more typical fashion, then rewritten in a more atypical fashion. Perhaps the extra writes in steps 7-9 are rewriting the metadata as described in this bug report. I have no facts as to why it is doing this, but as a former developer, I can guess - an inexperienced programmer is attempting to fix some prior bug and chose an architecturally inept way of doing it. Problem 1: LR 6 is writing twice as many bytes to disk as necessary, slowing down exports. Writes (often with a slightly different number of bytes) Opens for read/write access, read share modeĨ. Opens file.jpg for read/write access, read share modeħ. Here is what LR 5.7.1 does when exporting "file.jpg":īut LR 6.0.1 adds more steps - after writing "file.jpg", it reads it back into memory, then writes it out to a temp file "", and then renames "" back to "file.jpg":Ĥ. I used Process Monitor to trace the file calls made by LR 6.0.1, LR 5.7.1, and Bridge CC during an export, on Windows 8.1. For example, Denni Russell reported that exports were taking 2x longer in LR 6 compared to LR 5. This might account for reports of significantly slower exports. The trace also shows that LR 6 is writing each exported file twice, causing more than twice as much disk I/O as LR 5. The trace shows that indeed LR 6 has introduced a bug that will cause file viewers like Bridge and some backup programs to interfere with the export in unpredictable ways. I traced the filesystem calls made by LR 6.0.1, LR 5.7.1, and Bridge during an export on Windows. I just ran an export of 126 images using Lightroom 5.6 which completed successfully, as has always been the case with version 5 and before that with version 4. I have never had this problem with version 5. I have had one example of exporting of a single image failing with exactly the same error message. Watching the directory where the images are being exported with a file viewer while the export is in progress I can see that the images that are later shown in the "not exported" dialog box list are in fact being created in the target directory but are quickly deleted. On average around 20 out of 70 selected images don't get exported. If I delete the exported JPEGs and try again a different subset of the selected images gets exported. The file could not be opened ()", and then lists the file names of the images that were not exported. After the export is finished I get a dialog box saying "Some export operations were not performed. I select a number of images and use the Export dialog, exporting to JPEG. With Lightroom 6 on Windows 7 I have exactly the same problem as described at.
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