Release 10.1A: OpenEdge Deployment:
Managing 4GL Applications

> ## Code page compatibility

> The Internal Code Page (`-cpinternal`) startup parameter determines the internal code page that OpenEdge uses in memory. The code page in which r-code is compiled and the internal code page of the session in which the r-code runs must be compatible. That is, the r-code code page must be either the internal code page, undefined, or convertible to the internal code page.

> If the code page for a standard r-code procedure, from either an operating system file or a standard library, is not the same as the session’s internal code page, OpenEdge performs an in-memory conversion of the r-code text segments to the session’s internal code page.

> Note: If you use the R-code In Code Page (`-cprcodein`) startup parameter to specify a code page for reading r-code text segments, OpenEdge reads the text segments as if they were written in that code page, even if the text segments were written in a different code page.

> Since r-code procedures in memory-mapped procedure libraries are read-only, OpenEdge cannot perform an in-memory code page conversion of r-code text segments. If the code page of a memory-mapped r-code procedure is not compatible, OpenEdge will not execute the r-code. It will report an error and stop execution.

> When executing an r-code procedure from a standard procedure library, Progress accesses and executes the r-code segments in the execution buffer in local memory. Progress does not swap the r-code segments to the session sort file unless you specify the PROLIB Swap (-pls) startup parameter. By default, Progress reloads segments from the open library in local memory.

> Codepage-converted text segments within standard procedure libraries are swapped in and out of the session sort file, preserving any code page conversions that occurred during the initial load of the text segment.

> For more information about the Internal Code Page (`-cpinternal`) and R-code In Code Page (`-cprcodein`) startup parameters, see OpenEdge Deployment: Startup Command and Parameter Reference .

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