Simple splitting and compress by DLG

[Lucas65]

I understand and I thank you for giving me clear the concept. Recently I have become aware of these compression methods so it's all new to me.
I would have another problem that after using this great program I was presented. Using the method "reflate", at the end of compression gives me this error:



And after the error did not save the compressed file. The library 7z.dll I never touched. The .tmp and .raw file rest in the _tmp folder.
What may be due? Sorry again for your trouble.