In a direct communication with the source, we learned that although these series were previously published, they have subsequently been suppressed for reasons of confidentiality.

In response, we have marked them as "discontinued" in their metadata and the catalog. Figures are billions of euros (Bil. EUR) not seasonally adjusted (NSA). The series run from as early as December 1975 to as late as June 2016. The set of suppressed countries varies between the asset and liability sides of the dataset.

The series reside in the historical catalog (Germany » Trade » External Stock » Assets and Liabilities of Enterprises » Banks » Liabilities | Assets » Financial credits by country) and include, for example:

• AFLFSABNKFNCLTIDZAUM.IDEU = [DISCONTINUED] Financial accounts: External sector - Assets - Banks - Financial credits - Long-term original maturity [over 1 year] - All currencies - Algeria, (Bil. EUR, NSA)
• AFLFSABNKFNCLTIPAKUM.IDEU = [DISCONTINUED] Financial accounts: External sector - Assets - Banks - Financial credits - Long-term original maturity [over 1 year] - All currencies - Pakistan
• AFLFSLBNKFNCLTIFINUM.IDEU = [DISCONTINUED] Financial accounts: External sector - Liabilities - Banks - Financial credits - Long-term original maturity [over 1 year] - All currencies - Finland

Because catalog locations are subject to change, the upper-right search box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.