Unable to open index.db

Hi Rod. Thanks for your info. I have no problems with the disk space or about 100 GB available. The index should be around 4 GB, this is the situation of the folder: Mode LastWriteTime Length Name ---- ------------- ------ ---- -a--- 5/1/2019 12:00 AM 6144 archivelog_2.6.db -a--- 11/7/2016 8:45 PM 57344 custodian.db -a--- 4/23/2019 12:31 PM 24576 index.db.10804 -a--- 5/2/2019 8:45 AM 0 index.db.10804.lck -a--- 1/8/2019 1:38 AM 0 index.db.7568 - Copy.lck -a--- 5/2/2019 8:45 AM 65 index.db.helper -a--- 11/7/2016 1:33 PM 0 index.db.wlck -a--- 6/26/2017 12:34 PM 16384 ptag.db.1 -a--- 6/26/2017 2:12 PM 0 ptag.db.1.lck -a--- 6/26/2017 12:34 PM 13 ptag.db.helper -a--- 6/26/2017 12:34 PM 0 ptag.db.wlck -a--- 6/26/2017 12:34 PM 49152 tag.db.2 -a--- 6/26/2017 2:00 PM 0 tag.db.2.lck -a--- 6/27/2017 4:51 AM 114688 tag.db.7 -a--- 6/27/2017 6:44 AM 0 tag.db.7.lck -a--- 6/27/2017 11:49 PM 139264 tag.db.9 -a--- 6/28/2017 12:12 AM 0 tag.db.9.lck -a--- 6/27/2017 11:49 PM 39 tag.db.helper -a--- 11/7/2016 1:33 PM 0 tag.db.wlck -a--- 1/8/2019 1:02 PM 442368 userrisk_attack_surface.db.653 -a--- 1/8/2019 11:00 PM 0 userrisk_attack_surface.db.653.lck -a--- 1/8/2019 1:02 PM 15 userrisk_attack_surface.db.helper -a--- 12/29/2016 11:00 PM 0 userrisk_attack_surface.db.wlck I tried to run the first command but it gives me a 205 error as a result: PS D:\Program Files\DataInsight\bin> idxreader.exe -i D:\Datainsight\data\indexer\default\2\2 -a -c 5 --sort dsc Unable to get activity between Thu 01 Jan 00:00:00 1970 GMT-Thu 01 Jan 00:00:00 1970 GMT. error=205 What can it be? Thank you Paolo