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Hardware Requirements

Minimal requirements:

CPU1.2 GHz dual-core or higher
RAM2 GB or higher
Hard-drive space1 GB

Instant JChem employs a sophisticated caching system so that it can handle large data sets without needing all the data to be in the memory. In general this works very well, but everything has its limits. You may need to increase the memory that IJC will have access to. 

Additional memory for JChem Base database tables

  • Each million structures need additional 100 MB of memory
  • For 600 Markush structures, around 700 MB of additional memory is needed
  • For more detail, see memory usage documentation

For JChem Cartridge based solutions, minimum recommended memory should suffice. For server memory settings, see documentation here

Software Requirements

Operating System

Instant JChem is tested on the following platforms:

  • Windows  XP (32-bit) 
  • Windows 7 (64-bit)
  • Windows 7 (32-bit) - only with Java 7
  • Windows 8 (64-bit)
  • Windows 10 (64bit)
  • GNU/Linux (32-bit, 64-bit)
  • Mac OS X (64-bit)

JChem Cartridge Compatibility

Instant JChem is tested with following JCC versions:

  • 5.7
  • 5.12
  • 6.3
  • Current (same version as last release)

Supported Databases

  • Derby
  • MySQL 5.5 and newer
  • Oracle 10g and newer
  • Composite
  • Microsoft SQL Server 2005 Express and newer

For more info, please refer to user guide.

Please note, that Instant JChem might work with older versions of the databases (such as Oracle 9i), but as we do not test those, full functionality is not guaranteed.

Known issues and limitations

  • MySQL tables created with COLLATION uft8_bin will not work. Current workaround is to use different collation. For example utf8_general_ci

  • Can not create IJC Schema on MySQL 5.7. Current workaround is to turn off NO_ZERO_DATE restriction in the MySQL server instance. 

There are multiple ways to do that. E.g. find out your settings with:

SELECT @@GLOBAL.sql_mode;

and then apply new ones without NO_ZERO_DATE mode:

SET GLOBAL sql_mode = "<new-value-without-the-mode>";

  • In order for IJC to work correctly with MySQL 8 ONLY_FULL_GROUP_BY option has to be Turn off in the MySQL server instance.

There are multiple ways to do that. E.g. find out your settings with:
SELECT @@GLOBAL.sql_mode;
and then apply new ones without ONLY_FULL_GROUP_BY mode:
SET GLOBAL sql_mode = "<new-value-without-the-mode>";


Supported major Java versions:

  • Java 6 (till IJC version
  • Java 7 (from IJC version 6.2 - till IJC version 17.5.0)
  • Java 8 (from IJC version 15.2.20)
  • AdoptOpenJDK 8 (from IJC version 18.22.0 and LTS Carbon 1)

IJCJava BundleJava Tested
6.0.x1.6.0_451.6.0_45 and 1.7.0_25
6.1.x1.6.0_451.6.0_45 and 1.7.0_25
6.2.x1.7.0_251.6.0_45 and 1.7.0_25
6.3.x1.7.0_251.6.0_45 and 1.7.0_25
14.x1.7.0_251.6.0_45 and 1.7.0_71
15.x1.7.0_251.6.0_45, 1.7.0_76, 1.8.0_31 and 1.8.0

AdoptOpenJDK8 and JWS

Please note that AdoptOpenJDK8 doesn't support Java Web Start

Known issues

Problem with desktop shortcut when simultaneously using Java 6 and Java 7 with Java Web Start


Only 32-bit version of ChemDraw is supported. 

IJC versionChemDraw supported
5.12.xChemDraw 12 (32-bit)
6.0.3 and higherChemDraw 12 or 13 (32-bit)


IJC version5.12.x6.0.x6.1.x6.2.x6.3.x14.x15.x

IJC-Spotfire Bridge version5. build versionlatest build version
Spotfire server/client version3.3.2x




For more information, please refer to documentation.