Tag Archives for " #ILE "

Aug 09

‘device file does not contain an entry for screen size’

Upgraded our IBM i systems to IBM i V7.3 yesterday and so far everything is running nicely except for this one weird little glitch: some of the existing DDS WINDOW SCREENS are bombing with CPF4169 The device file does not contain an entry for screen size when they seem to have been quietly working for years, […]

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Oct 31

Using QSNRTVMOD to find the last displayed screen size

While I was writing that previous blog about handling wide fat screens I stumbled across another useful API (QSNRTVMOD) for retrieving the current screen mode that we are displaying. This means we could find our screen width programmatically. Why isnt that a word? I’m not too sure why anyone would want to do this but… […]

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Sep 02

How can I learn modern RPG using ILE or Free Form?

First of all – if there was a quick and easy solution to “how to quickly become a productive RPG IV and ILE programmer” then all of us old AS400, iSeries and IBM I developers would have gobbled up that solution in double quick time. But, it really is much easier than it seems. Modern […]

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Jul 19

AS400 Modernization starts with Modernizing RPG Applications

RPG Modernization

Modernizing RPG Programs – Learn the RPG History first I had email email from an old work colleague this morning. He was a windows programmer, with limited exposure to RPG, but works in a company that is driven by a huge, old, complex RPG3 application that has changed little over the last decade. He is […]

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Jul 12

Dirty RPG programmers need to write Clean RPG Code

This morning I was revisiting a program that I wrote last year and looking at my code thinking “Why the hell did I write it like that? #Ugly”. RPG code evolves and lots of code evolution starts in one direction and then branches off, drunkenly in another direction. This means that code can evolve to […]

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Jul 12

Write to joblog messages from RPGLE /FREE – a QMHSNDPM code example

RPG CODE EXAMPLE – “Write to joblog” in RPG4 /FREE Write to joblog lets us send messages from inside a running RPG program. It’s simple using one of IBM’s API’s – QMHSNDPM RPGLE Code Example // SNDMSGLOG1.RPGLE // Simple Program to send message to joblog using QMHSNDPM // Author: nick@nicklitten.com ctl-opt dftactgrp(*no) actgrp(‘NICKLITTEN’) option(*nodebugio:*srcstmt:*nounref) alwnull(*inputonly) […]

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Jun 30

How to use named indicators in RPG

When is an RPG indicator more than just a number? We can use a named data structure to overlay over the top of all the indicators used in the program. Using this technique, we can define a sensible name for the each of the memory spaces associated with the indicators. For example — when the user […]

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Jun 25

What is RPG OA?

I was talking about RPG OA today. If you’re an IBM i techie, then you will know about OA already. You probably understand its power and potential in our IBM-i world. If youre a bit more old school, you’ve been churning out column based code for years, or you are living under a rock in […]

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Jun 02

RPG Example reading JSON using YAJL from IFS

Decode JSON webservice reply data (already stored in IFS) using YAJL This reads the JSON from the IFS – decodes it using Y.A.J.L and reports on time taken to perform decode. Writing an RPG program to read JSON using YAJL is actually pretty straightforward — I hope this code example helps! In this case the […]

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