Crash when merging or rearranging

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Some users may experience crashing during the process of saving changes made in rearrange mode, merging files together, or creating a merged and/or merged annotated setlist. This typically happens when working with large files or files within many pages.

Unfortunately this is not a forScore bug, but an issue with the Apple framework we use for rendering PDFs. iOS has a watchdog process that monitors app memory usage and will arbitrarily shut down apps that it deems to be taking too long to complete an operation or using too much processor memory. This tends to occur most frequently when rearranging or merging large and/or high-resolution files.

Unfortunately we don’t have any means of changing this behavior ourselves, as the process is arbitrary. We recommend checking the PDF’s file resolution using PDF editing software (such as Adobe Acrobat) to make sure it’s optimized for display on the iPad screen. We recommend no more than 300dpi for best balance of resolution and performance. If the file is larger than 300dpi, downsample it using a PDF editing utility so that the saving process in forScore doesn’t require as much system memory. To swap out the downsampled PDF for the original one, see this knowledge base article.

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