CiviCRM Community Forums (archive)

I am uploading a csv file using import activities and there are 3 steps
1. Upload Data --  works .
2. Match Fields -- works but only with non-custom fields of activities.
While trying to import it gives error for custom fields

My csv goes as follows:in the attachment
1.your city,
 2.year built,
 3.job type
 4.contractor information ,
5. job size
&
6.select option
 are custom data fields of activities.
The download errors I get are as follows : Also attached is the error csv file
Reason
Invalid value for field(s) : field ID; ; field ID; ; field ID; ; field ID; field ID; ; field ID

Where am I going wrong while importing  ? Is it the custom data fields causing the errors ?
Ps See the attachments .