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Common Issues

The two most common issues running Expresii are with GPU and stylus.

Graphics Processing Unit (GPU)

Expresii belongs to a new class of software that makes use of the Graphics Processing Unit (GPU) found in your computer  to accelerate processing.  For that,  Expresii requires  OpenGL 3.0    (a  software  standard )  or better.  

To check the  OpenGL   version your GPU supports, you can use our  【System Checker 】.  Other 3rd-party GPU info checking tools include  GPU Caps Viewer and GPU-Z.  If your computer is less than 3 years old, chances are your GPU is qualified. 
Download ‘X System Checker’
 If   you  get   errors   like  "unable   to  create   pBuffer" or "TTextureOp.ProcessTexture()", please  make sure you have the latest  graphics driver for your graphics hardware. Here are the links to the  three most popular GPU makers:
  • Intel HD  graphics driver
  • AMD/ATI graphics card driver
  • Nvidia  graphics card driver
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X System Checker showing your system info. You can send us your info for diagnosis.
PictureOptimus settings
Laptops with Discrete GPU
If you have a laptop with an nvidia  GPU, it's likely it uses what they call Optimus technology to switch between the integrated and the     discrete  GPU's.  You should therefore make sure you use  discrete GPU for Expresii by choosing "Performance processor" for Expresii (or as a Global Setting)  shown in the screenshot on the right.


Stylus

Expresii uses the  WinTAB API  for stylus  data  reading . If your graphics tablet's driver supports the WinTAB API, it is best to use that.  For instance, if your Microsoft Surface comes with an NTrig pen, you should install the  NTrig's WinTab driver .

On Win8+, we use a built-in WinTab   emulator   so that  even if your digitizer   doesn't support WinTab we can still use  it    via  Microsoft's  API.

To test if your stylus is working properly with  Expresii, you can  use the diagnostics tool inside the Expresii System Info box as shown on the right. 

Note that Expresii uses stylus  tilt so it's best to get a stylus  that supports tilt-sensing.

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Expresii's built-in diagnostics tab

Common Errors

Unable   to create pbuffer:    Try   update your driver (see above).  If   you're using  Intel  HD 3000, sorry, this  GPU is too weak to handle large  images.

Error in saving artwork: Access violation at [...]  :    Try   update   your  driver (see  above).   Some people with nvidia driver  347.52  would get  this. Updating   the driver solves the problem.

TTextureOp.ProcessTexture(): EAccessViolation [...]   'atioglxx.dll':  Try   update   your   driver  (see   above).    Yes, we get this from ATI/AMD cards  sometimes.

Error in shader: Your hardware/driver doesn't support [...]:   We ge this  from   HD   Graphics   4400 with   driver    Build 10.18.14.4170.  Again,  update your driver.  Build  15.xx  got   this fixed.

Error in shader: Fragment shader(s) failed to link  [...]:  Got this  on  ATI Radeon HD 5570 @ OpenGL 3.1.9210.  Again, try  update  your driver.

Out    of    memory:    If you get 'out of memory' error when exporting artwork,  try  close other  apps  and try again   (restart Expresii too to avoid fragmented memory space, even if you have lots of memory).      

Runtime Error  217 :    Possibly  due to your internet connection being  too slow (and we get a timeout).  Please  try to use a faster connection.
Artifacts seen on Intel:  I think we've finally fixed all related issues seen on Intel Win10 (tested on Surface Pro 4 /w i5-6300U, and a desktop /w i3 6100, GPU driver  Build 10.18.14.4414).
If you still see errors shown on the right, update Intel's graphics driver. If your version of Expresii is before 2016/08/29,  update Expresii too.
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Loss of color in the strokes /w Intel GPU on win10
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Artifact seen on Intel GPU on Win10
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'Texture Error' on the whole paper seen on Intel GPU driver Build 10.18.14.4170

About Anti-virus software

Some virus checkers  (in this sample report, 3 out of  56) on our X.exe being infected.  We update Expresii quite often and  from week to week those checks would give different results.  We tried our best to contact those anti-virus  makers about our situation but sometimes they just ignored us. FYI, Softpedia listed Expresii as '100% Clean', if that gives you more confident that there's no danger in installing / running Expresii.

Other issues

Check  out our  video tutorials    for basic demonstrations.

Parallels (Mac) users, please see this  blog entry. Note that currently we do not actively support Parallels, as there are still compatibility issues (e.g. they support  only  up to  OpenGL 2.x).  We recommend using BootCamp if you want to use Expresii on your Mac for best experience.

If you still have issue running Expresii after you installed the latest drivers, please visit our  User Forum  (alternate forum under testing).   Also, check out our  FAQ.
華語圈的朋友:我們懂中文,如您遇到什麼問題,可用中文跟我們溝通。還有這個中文為主的網網誌,內有在中國如何下載購買等資信。
日本のユーザー:通信するために日本語を使用することができます。私たちは少し日本語を知っているとGoogle 翻訳が使用されます。

Finally, you are welcome to  contact  us for any  issue still    unresolved .
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