couldn't rename an attachment file

Kou Ssi

i am using the pluggin power script for jira to access a file and rename it via the code 
everything seems okay (syntax and execution) however the routine renamefile() is returning always a false value . 

So my question is , do i need to open a file before renaming it ? what can be the cause of this problem 

Anna Hryhoruk _Appfire_

Hello @Kou Ssi ,
Did you check your Jira log for any error messages? If not yet, please look into it. There may be something helpful. 
I assume one of the problems may be " file is not accessible (request denied)". If that`s the case, please visit this SILSecurityException when accessing files for more details.
Also, pay attention that you need to use forward slashes ( /) for file paths. 
If that doesn`t help, please provide the script you use and if there are any errors in Jira log. 

Best Regards,
Anna