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 isCOBOL General

What does the error "NO X11 DISPLAY" mean?

When you get this error: "No X11 DISPLAY variable was set, but this program performed an operation which requires it." It means that isCOBOL is trying to access the AWT/SWING GUI Interface and your system doesn't have that. If your... Read More

How can I encode a URL String?

You can work with the OOP statements using the Java class named "java.net.URLEncoder", available with the Java Runtime, useful to encode a URL string: http://docs.oracle.com/javase/7/docs/api/java/net/URLEncoder.html The following is an example of... Read More

How to read QR codes

In KB article #320, we showed how to generate a QR code in your COBOL program. In this article, we'll show you how to call the attached program to generate or read a QR code. Like the earlier article, you must first download 2 jar files, and... Read More

Working with sequential files on Pipes

Piping can be used for files declared as: a) a printer file (ASSIGN TO PRINTER) b) a line sequential file (assuming to compile with -flsu) In all other cases (relative file, binary sequential file etc) piping it is not allowed. Here a simple... Read More

How can I monitor a jvm started on a remote computer box?

You can run JvisualVM to monitor, troubleshoot, and profile your jvm when using isCOBOL Server. There are detailed instructions in the isCOBOL Application Server documentation, in a chapter called "Tuning and monitoring isCOBOL Server with JvisualVM... Read More

How to set switches with isCOBOL

A common practice in COBOL programming is to manage switches to change the behavior of the program. In isCOBOL there are four ways to accomplish this task: In your configuration file using the "iscobol.switches=" configuration variable You can... Read More

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