QNAP Google Drive Synch (which is using Grive) manually syncs but not when scheduled - CURL error.

[BalooBearUSA]

When running Google Drive Synch manually, everything works as expected - thanks. However when I try to schedule a synch I receive the follow CURL error.

QNAP TS-410 NAS
My related system settings
Time/Server: Synchronize with Internet Time server automatically, 0.europe.pool.ntp.org
Google Drive Sync: 0.3.3.7, Direction NAS to Google Drive
Google Drive Size: 23GB, 31,238 Files

Is it something to do w/the scheduling part of this program as manual synchs work fine (See Manual Log Success below)?
All files synch as expected. However, if I then create a schedule (eg I tried both daily and hourly) they fail (See Schedule Fail Log)?
I had thought it might be the fact it takes about 2 hours to run manually (I guess would impact hourly), but not the daily?

Possibilities considered:
• I've re-installed the Google Drive Sync application with no change in results.
• I've re-started the QNAP server with no change in results.
• I do have two-pass authentication on my Google account, but I don’t think that affects it as you can see manual synchs work just fine.
• I also see that at the number of files I have is slightly over the recommended 30,000 for ARM, but the manual synchs work fine?
• To check that authentication wasn't an issue, I did a manual (success), schedule (fail) and manual (success).

On a side note; it would be also nice to manually change the time interval. Once the scheduled syncs work I’d be comfortable tweaking the script.

Manual Log Success [2015-01-14-20-26-38]: Actual file names changed to [Private DATA], but it did do many…

[quote]
last sync time: 1970-01-01T00:00:00.000Z
Reading local directories
Synchronizing folders
resquest failed due to auth token expired: 401. refreshing token
Reading remote server file list
Synchronizing files
sync ./[PRIVATE DATA] changed in local. uploading
sync ./[PRIVATE DATA] doesn't exist in server, uploading
Sync time (from local time): 2015-01-14T20:26:38.752Z
Finished!
[/quote]

Schedule Log Fail [2015-01-15-00-00-04]:
[quote]
last sync time: 1970-01-01T00:00:00.000Z
Reading local directories
Synchronizing folders
resquest failed due to auth token expired: 401. refreshing token
Reading remote server file list
Curl failed due to error: 35, url=https://docs.google.com/feeds/default/private/full?start-key=[Private DATA]&showroot=true&showfolders=true, http_code=0.
exception: Throw in function (unknown)
Dynamic exception type: N2gr3xml5ErrorE
std::exception::what: std::exception
[PN2gr4expt6MsgTagE] = invalid node
[PN2gr4expt12BacktraceTagE] = #0 0xda910 crtstuff.c:0 gr::Exception::Exception()
#1 0xe0d90 crtstuff.c:0 gr::xml::Error::Error()
#2 0xe6dec crtstuff.c:0 gr::xml::TreeBuilder::Result() const
#3 0xbf830 crtstuff.c:0 gr::http::XmlResponse::Response() const
#4 0xaa834 crtstuff.c:0 gr::Feed::Start(gr::http::Agent*, gr::http::Header const&, std::string const&)
#5 0xaac50 crtstuff.c:0 gr::Feed::GetNext(gr::http::Agent*, gr::http::Header const&)
#6 0x97c70 crtstuff.c:0 gr::Drive::DetectChanges()
#7 0x783d4 crtstuff.c:0 Main(int, char**)
#8 0x78788 crtstuff.c:0 main
#9 0xb6a22924 /lib/libc.so.6 __libc_start_main
#10 0x765f0 crtstuff.c:0 _start

[/quote]

My system

[quote]
Model name: TS-410
Firmware version: 4.1.2 Build 20141229
OS to access: Window 7
Number of HDDs: 4
HDD model: 2 Hitachi HDS722020ALA330 JKAO, Seagate ST32000542AS CC94, Seagate ST2000DL001-9VT1CC96
HDD capacity: (1.82 TB)
RAID configuration: Raid 5
Services enabled: AntiVirus, Download, FTP, MS Networking, Multimedia iTunes, DLNA, Music, Photo, File Station, Rsync, VPN, WebServer
External devices: INNO TECH USB to Serial
NAS connection speed/ MTU: 100 Mbps/1500
[/quote]