Running wp-cli from bash script results in path error - bash

Question

I have successfully installed wp-cli on my remote server and created the "wp" alias. I use Putty to connect via SSH, and everything works just fine. First, I used a .user_bashrc file to set the alias with:
alias wp='/www/htdocs/w019d58a/wp-cli.phar'
The path is set in .user_bashrc using:
export PATH=/www/htdocs/w019d58a/:$PATH
However, when I tried to run wp-cli from a bash script, I got a "wp command not found" error. I contacted the support, and they recommended a symlink. So, I created a symlink using:
ln -s /www/htdocs/w019d58a/wp-cli.phar wp
Everything works but the installation process. I can, for example, install a plugin using:
#!/bin/bash
wp plugin install akismet
Unfortunately, I can't download WordPress via the bash script using:
wp core download --locale=de_DE_formal
I always get the error:
Error: Too many positional arguments:
Error: This does not seem to be a WordPress installation.
Pass --path=path/to/wordpress or run wp core download.
I tried to add the path using:
wp core download --locale=de_DE_formal --path="/www/htdocs/w019d58a"
No luck. I stil get the same error.
I can download and install WordPress directly from the console and do further operations using a script. But I can't download and install it from the script due to the path error.
Any ideas how to fix that?
I've just found out, that the download is working fine:
#!/bin/bash
wp core download --locale=de_DE_formal
It's the config create part that causes trouble:
wp config create --dbname=d123456 --dbuser=d123456 --dbpass=123456 --dbhost=localhost --dbprefix=wplcli_