I'm having a problem doing Ctrl-C.

A progress blue bar appears at the bottom right corner and al the UI hangs.

I'm using DraftSight SP3 with ubuntu linux 18.04 and Nvidia graphics card.

If I start the program from command line no warning/error emitted.

with strace, the last calls that I show was...

futex(0x29ddc3c, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x29ddbe8, FUTEX_WAKE_PRIVATE, 1) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\\202\\3\\n\\0L\\0\\300\\7\\317\\0\\300\\7\\300\\4@\\3\\0\\0\\0\\0\\300\\4@\\3\\0\\0\\0\\0 \\2\\0g"..., iov_len=44}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 44
futex(0x7ffc88768f78, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x2929848, FUTEX_WAKE_PRIVATE, 1) = 0
write(5, "\\1\\0\\0\\0\\0\\0\\0\\0", 8) = 8
poll([{fd=5, events=POLLIN}, {fd=6, events=POLLIN}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}], 4, 0) = 1 ([{fd=5, revents=POLLIN}])
read(5, "0\\0\\0\\0\\0\\0\\0\\0", 16) = 8
write(5, "\\1\\0\\0\\0\\0\\0\\0\\0", 8) = 8
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\\26\\0\\4\\0\\3\\0\\300\\7C\\1\\0\\0v4\\363R\\27\\0\\2\\0C\\1\\0\\0", iov_len=24}], 1) = 24
futex(0x7ffc887699a8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x2929848, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x3024380, FUTEX_WAIT_PRIVATE, 0, NULL