Today I had to work around an issue with clipnames. When there is a clip present, but the name is empty, live.object will not bang the output (not even a bang!). To illustrate: start a new project in live, create a clip on a midi track, or put something in the Audio track. Next create new M4L device and put this in:
<pre><code>
----------begin_max5_patcher----------
788.3oc0X00aaBCE8YpT+OXwyrHrw70da+NVqh.hWh2HPD3z00p8ee1FSZR6
X3vGwrGpr70twm6gy85i7q2emkcZ4yjZavmAeEXY8JOhkLlHhUa.K68IOmkm
TK2ncA4mkoe21QsFi7LSFup7Hi.JR1SNs12JKXx.h0+REMI+zRGRXY6nEaWW
QxXM..6ux0AfhjCgdxItqbAO19+TbbOsHmvj3.dVT9I2FFc9YWSeQd1PD+GS
EuYurecfzbp11N7+d6PnajnkmheB4ZKC966uSLxGbzlkROxXkE8mtP+17bHY
KryrJMoXaGYk2vyp8j55jsjO9wmme6.4zmHqqILvSzZZZNYMqJI6G0.WPVN8
v557RV6jQIQBZXK+HIAF0Iog5gzzWh72IR7vIxtJhNTQKXiuHxSQTwCSV41G
CcNK3O8r.CjBxGEA.8kZDOzJ+aSWDY8V2cRBlgZtsjIPo.iaTJHCWKEN8pHQ
6nUhFSiifbkC9gCqTxaX2G0sRJZlHJ9JhLeTWcikEcAA8PUysVJd5onQatwq
4RKO3hwcCLdF5I8fM3A6AKhZtWGdVqay0QBNCEZujCpHaGpBxqgWTteBvCqJ
aRkPAyoAYUBe6cHCw++5PVQZKDKxPzBzhrhhvt2LOxQyiEYtIYP53HAkOYna
3vLJiGrQ4SFlc9WkhgKOeysMfQKBiyAKOeysRqElw4knu4VsT3hv3L78TTyt
34YwGdjPYxHV3cDWc4wpr1iQ4QvAbVBsgTynEILJ+x+21UzkaZGcyFRwEsY2
S2bnj24WADvic+4Targb0AaHey.NAwA6EbwWtq9AWfxSPSiqFeUWNS0ZC5Bk
WJHlMcYT+zcnYn6Hs.WfY.WnVfK1LfCqE3LTItmVfCaFvEqE3bMB3fZANXv0
1+wi631+zST6GgOMaZfsVn1LUJhpXTuX6pIz3nFy6RmVXOkKhKl4Kes.LLPt
SwrogrilGMB1eV0HhuCd8h5qtgEFEc1SpqxA4rIC05w0lQY2qWECc2oNzlY7
b.05lSHxLfSKhyLXSKijvQCMQ.9vePyTHMC
-----------end_max5_patcher-----------
</code></pre>
This will give you this patch:
Clip both buttons and see what it does in the Max Window. "zl reg", in combination of the "trigger" (t b b l b) is perfect for the job 
.
Explenation of "zl reg":
In reg mode, the input or the most recently stored input value received in the right inlet.
*exactly* what we need.
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