[fpc-pascal] Can't close and reopen ptcgraph

Stefan V. Pantazi svpantazi at gmail.com
Fri Jun 23 18:17:56 CEST 2017

On Linux 64bit, reopening of a second window works fine, as expected. On 
Windows it does not, and behaves as you reported. This is most likely 
related to the use of a separate thread (TPTCWrapperThread) in ptcgraph. 
As far as I know graph and wincrt do not use threads. I suspect that on 
windows, the ptc thread is not properly terminating for some reason.


On 06/23/2017 11:20 AM, James Richters wrote:
> I ran into an unexpected issue with ptcgraph.  If I use closegraph, I
> cannot re-open a new ptcgraph window with Initgraph.  It looks like it
> opens the second graph window but then closes it immediately after.. my
> program is then appears to be locked up after this happens.. no errors,
> just locked up.   test program is below.  If I comment out ptcgraph and
> ptccrt and uncomment graph and wincrt, it works as expected.

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