It probably comes from installing an extension while the compiler is still enabled.
Important note :
- If the compilation is enabled on your website ( System > Tools > Compilation ). Disable it first before installing any extension. After installation re-run the compilation process and re-enable the compiler.
- Before installing any extension, it's advisable to backup your Magento installation.
Here is the way to disable the magento compiler:
Edit the following file: includes/ and add a # before the 2 following lines:
“The Trichotin DHT Inhibitor and Trichotin Hair Regenesis products have been tested over several years, by the International Hair Loss Institute (IHLI). The results were discussed at the latest congress of the International Hair Loss Institute held in Amsterdam, Netherlands. Trichotin DHT Inhibitor and Trichotin Regenesis was unanimously endorsed by all the members of the IHLI and will henceforth be recommended in the members clinics for the treatment of alopecia.”
Dr Ivan Simoen
President of the International Hair Loss Institute