I'm looking for a way to correct the sixe of xls reports that contain graphs. I did some digging in the resultant .xls and it seems the MSODRAWINGGROUP and subsequent CONTINUE blocks are filled with mostly NULLs (0 value bytes). To me it looks like CRJ is creating an EMF picture, compressing it to a EMZ and then storing it as if it was still the size of the EMF. Thus tons of wasted space for every subsequent image. (In the file I studied it had 9 graphs and 8 40-80K blocks of NULL! So the pictures used 618K rather than 28K!
I've tried opening the resultant XLS in POI and have yet to figure a way to surgically trim this fat. (I was able to trim maybe 1% of size by letting POI toss a few superfelous records, but not these large NULL blocks. About the only solution I see is to use a licensed copy of excel and this adds a whole lot of issues since the application it not run on windows. It seems POI does not support EMF format fully. (atleast thats what the docs said, yet I was able to EXTRACT the EMF data and view it with Office viewer (OIS.exe)
I've tried ssconvert and the images are lost. What else could I try?
I've tried 12.2.14 and 12.2.217 with no improvement.