I think you need to change the syntax of the '-dpi' option.
On my machine the DOS command
inkscapec --export-eps=test2.eps -T -dpi=300 c:\Windows\temp\opacity_fails.svg
leads to a crash as you had. However, the command : inkscapec --export-eps=test2.eps -T --export-dpi=300 c:\Windows\temp\opacity_fails.svg
leads to the attached eps file. The difference is the syntax of the dpi option.
I think you need to change the syntax of the '-dpi' option.
On my machine the DOS command
inkscapec --export- eps=test2. eps -T -dpi=300 c:\Windows\ temp\opacity_ fails.svg
leads to a crash as you had. eps=test2. eps -T --export-dpi=300 c:\Windows\ temp\opacity_ fails.svg
However, the command :
inkscapec --export-
leads to the attached eps file. The difference is the syntax of the dpi option.