No valid data file found, script ends

PWS_graph_xx.php(25) loaded  =>PWS_graph_xx.php|01|2020-11-29|
PWS_graph_xx.php (29) include_once  =>./PWS_livedata.php
PWS_livedata.php (22) version =>PWS_livedata.php|01|2020-12-08|
PWS_livedata.php (25) include_once =>PWS_settings.php
PWS_settings.php (28) version =>PWS_settings.php|01|2020-12-08|
PWS_settings.php (32) include =>/homepages/5/d487327495/htdocs/pwsWD/_my_settings/settings.php
PWS_settings.php (158) $defaultlanguage=es-es $used_lang =es-es $locale_wu=es-ES $lang_locale=es $lang_file=languages/lang_es.txt
PWS_settings.php (256) $units_used =metric $windunit=km/h $tempunit=C $rainunit=mm $pressureunit=hPa $distanceunit=km $wu_unit=m
PWS_livedata.php (29) include_once =>PWS_shared.php
PWS_shared.php (21) version =>PWS_shared.php|01|2020-11-02|
PWS_livedata.php (39) $itsday =1
PWS_graph_xx.php (51)  period set to day from request day
PWS_graph_xx.php (58) type set to temp from request temp
PWS_graph_xx.php (145) loading  =>./chartswudata/no keyYMD.txt
PWS_graph_xx.php (172)Line-names contains