問題出現過程：

1.在執行ant demo.setup.tomcat安裝jBPM的過程中出現如下錯誤資訊

D:/jbpm-4.4/examples/build.xml:95: org.jbpm.api.JbpmException: no jBPM DB schema: no JBPM4_EXECUTION table. Run the create.jbpm.schema target first in the install tool.

2.於是執行ant create.jbpm.schema，發現第一個錯誤資訊如下

[java] 12:23:49,484 INF | [DbHelper] --- Executing DB Commands ------------------------- [java] 12:23:49,484 INF | [DbHelper] create table JBPM4_DEPLOYMENT ( [java] DBID_ bigint not null, [java] NAME_ longtext, [java] TIMESTAMP_ bigint, [java] STATE_ varchar(255), [java] primary key (DBID_) [java] ) type=InnoDB [java] 12:23:49,562 WRN | [JDBCExceptionReporter] SQL Error: 1064, SQLState: 42000 [java] 12:23:49,562 SEV | [JDBCExceptionReporter] You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'type=InnoDB' at line 7

3.在Navicat Lite中執行該條SQL語句也同樣報錯，查MySQL的幫助手冊發現是Engine=InnoDB

4.經上網搜尋發現，MySQL 4.0開始不建議使用type=InnoDB，建議使用Engine=InnoDB，而MySQL 5.5只能用Engine=InnoDB

解決方案：

1.修改jbpm-4.4/install/src/db/create/jbpm.mysql.create.sql中的指令碼

2.安裝MySQL Server 5.1