failure of postmaster during installation

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Christopher Howell
Your email address :chris(at)applix(dot)com

System Configuration
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Architecture (example: Intel Pentium) :Intel Pentium II

Operating System (example: Linux 2.0.26 ELF) : RedHat 5.2 Linuc 2.0.36

PostgreSQL version (example: PostgreSQL-6.4.2) : PostgreSQL-6.4.2

Compiler used (example: gcc 2.8.0) :??

Please enter a FULL description of your problem:
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starting postmaster with
nohup postmaster > regress.log 2>&1 &
gives a log file:
Database system in directory /home/postgres/pgsql/data is not compatible with
this version of Postgres, or we are unable to read the PG_VERSION file.
Explanation from ValidatePgVersion: Version number in file
'/home/postgres/pgsql/data/PG_VERSION' should be 6.3, not 6.4.

No data directory -- can't proceed.

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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install, following instructions, with no options except configure --prefix
error occurs starting postmaster.

If you know how this problem might be fixed, list the solution below:
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don't know.

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Christopher Howell | chowell(at)applix(dot)com
Senior Staff Engineer | 508 870 0300 x238 fax: 508 366 4873
Applix, Inc. | 112 Turnpike Road, Westboro MA 01580 USA