A possible solution is to free all inactive instr spaces
except `csound->curip'. It is safe and without memory leaks.

diff -ur csound5~/Engine/insert.c csound5/Engine/insert.c
--- csound5~/Engine/insert.c	2012-03-24 22:15:55.000000000 +0100
+++ csound5/Engine/insert.c	2012-03-24 22:16:51.000000000 +0100
@@ -676,7 +676,7 @@
         prvip = NULL;
         prvnxtloc = &txtp->instance;
         do {
-          if (!ip->actflg) {
+          if (!ip->actflg && ip != csound->curip) {
             cnt++;
             if (ip->opcod_iobufs && ip->insno > csound->maxinsno)
               mfree(csound, ip->opcod_iobufs);          /* IV - Nov 10 2002 */


tito

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